diff --git a/src/XeroPHP/Models/Accounting/Account.php b/src/XeroPHP/Models/Accounting/Account.php
index d4e7fb11..91818e3d 100644
--- a/src/XeroPHP/Models/Accounting/Account.php
+++ b/src/XeroPHP/Models/Accounting/Account.php
@@ -211,27 +211,28 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Code' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'Name' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'Type' => array (true, self::PROPERTY_TYPE_ENUM, null, false),
-            'Description' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'TaxType' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'EnablePaymentsToAccount' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false),
-            'ShowInExpenseClaims' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false),
-            'Status' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'AccountID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Class' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'SystemAccount' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'BankAccountNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'CurrencyCode' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ReportingCode' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ReportingCodeName' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'HasAttachments' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false)
+            'Code' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Name' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Type' => array (true, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'Description' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'TaxType' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'EnablePaymentsToAccount' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false),
+            'ShowInExpenseClaims' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false),
+            'Status' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'AccountID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Class' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'SystemAccount' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'BankAccountNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'CurrencyCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ReportingCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ReportingCodeName' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'HasAttachments' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/Address.php b/src/XeroPHP/Models/Accounting/Address.php
index 3dc7f8cb..5fe7d97e 100644
--- a/src/XeroPHP/Models/Accounting/Address.php
+++ b/src/XeroPHP/Models/Accounting/Address.php
@@ -128,21 +128,22 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'AddressType' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'AddressLine1' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'AddressLine2' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'AddressLine3' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'AddressLine4' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'City' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Region' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'PostalCode' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Country' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'AttentionTo' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'AddressType' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'AddressLine1' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AddressLine2' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AddressLine3' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AddressLine4' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'City' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Region' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'PostalCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Country' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AttentionTo' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/BankTransaction.php b/src/XeroPHP/Models/Accounting/BankTransaction.php
index cea82fa4..6a535614 100644
--- a/src/XeroPHP/Models/Accounting/BankTransaction.php
+++ b/src/XeroPHP/Models/Accounting/BankTransaction.php
@@ -192,29 +192,30 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Type' => array (true, self::PROPERTY_TYPE_ENUM, null, false),
-            'Contact' => array (true, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Contact', false),
-            'Lineitems' => array (true, self::PROPERTY_TYPE_OBJECT, 'Accounting\\BankTransaction\\LineItem', true),
-            'BankAccount' => array (true, self::PROPERTY_TYPE_OBJECT, 'Accounting\\BankTransaction\\BankAccount', false),
-            'IsReconciled' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false),
-            'Date' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'Reference' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'CurrencyCode' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'CurrencyRate' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Url' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Status' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'LineAmountTypes' => array (false, self::PROPERTY_TYPE_FLOAT, null, true),
-            'SubTotal' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'TotalTax' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Total' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'BankTransactionID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'HasAttachments' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false)
+            'Type' => array (true, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'Contact' => array (true, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Contact', false, false),
+            'Lineitems' => array (true, self::PROPERTY_TYPE_OBJECT, 'Accounting\\BankTransaction\\LineItem', true, false),
+            'BankAccount' => array (true, self::PROPERTY_TYPE_OBJECT, 'Accounting\\BankTransaction\\BankAccount', false, false),
+            'IsReconciled' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false),
+            'Date' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'Reference' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'CurrencyCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'CurrencyRate' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Url' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Status' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'LineAmountTypes' => array (false, self::PROPERTY_TYPE_FLOAT, null, true, false),
+            'SubTotal' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'TotalTax' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Total' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'BankTransactionID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'HasAttachments' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/BankTransaction/BankAccount.php b/src/XeroPHP/Models/Accounting/BankTransaction/BankAccount.php
index 53cee3c3..3b75c890 100644
--- a/src/XeroPHP/Models/Accounting/BankTransaction/BankAccount.php
+++ b/src/XeroPHP/Models/Accounting/BankTransaction/BankAccount.php
@@ -76,13 +76,14 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Code' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'AccountID' => array (true, self::PROPERTY_TYPE_STRING, null, false)
+            'Code' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AccountID' => array (true, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/BankTransaction/LineItem.php b/src/XeroPHP/Models/Accounting/BankTransaction/LineItem.php
index 08512b9b..85c9137f 100644
--- a/src/XeroPHP/Models/Accounting/BankTransaction/LineItem.php
+++ b/src/XeroPHP/Models/Accounting/BankTransaction/LineItem.php
@@ -118,19 +118,20 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Description' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Quantity' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'UnitAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'AccountCode' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ItemCode' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'TaxType' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'LineAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Tracking' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'Description' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Quantity' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'UnitAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'AccountCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ItemCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'TaxType' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'LineAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Tracking' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/BankTransfer.php b/src/XeroPHP/Models/Accounting/BankTransfer.php
index 6a665c87..41d3e8d7 100644
--- a/src/XeroPHP/Models/Accounting/BankTransfer.php
+++ b/src/XeroPHP/Models/Accounting/BankTransfer.php
@@ -122,20 +122,21 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'FromBankAccount' => array (true, self::PROPERTY_TYPE_OBJECT, 'Accounting\\BankTransfer\\FromBankAccount', false),
-            'ToBankAccount' => array (true, self::PROPERTY_TYPE_OBJECT, 'Accounting\\BankTransfer\\ToBankAccount', false),
-            'Amount' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'Date' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'BankTransferID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'CurrencyRate' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'FromBankTransactionID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ToBankTransactionID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'HasAttachments' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false)
+            'FromBankAccount' => array (true, self::PROPERTY_TYPE_OBJECT, 'Accounting\\BankTransfer\\FromBankAccount', false, false),
+            'ToBankAccount' => array (true, self::PROPERTY_TYPE_OBJECT, 'Accounting\\BankTransfer\\ToBankAccount', false, false),
+            'Amount' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Date' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'BankTransferID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'CurrencyRate' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'FromBankTransactionID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ToBankTransactionID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'HasAttachments' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/BankTransfer/FromBankAccount.php b/src/XeroPHP/Models/Accounting/BankTransfer/FromBankAccount.php
index a38a2768..ccc5ac18 100644
--- a/src/XeroPHP/Models/Accounting/BankTransfer/FromBankAccount.php
+++ b/src/XeroPHP/Models/Accounting/BankTransfer/FromBankAccount.php
@@ -82,14 +82,15 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Code' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'AccountID' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'Name' => array (true, self::PROPERTY_TYPE_STRING, null, false)
+            'Code' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AccountID' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Name' => array (true, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/BankTransfer/ToBankAccount.php b/src/XeroPHP/Models/Accounting/BankTransfer/ToBankAccount.php
index bf884e72..5b38429f 100644
--- a/src/XeroPHP/Models/Accounting/BankTransfer/ToBankAccount.php
+++ b/src/XeroPHP/Models/Accounting/BankTransfer/ToBankAccount.php
@@ -82,14 +82,15 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Code' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'AccountID' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'Name' => array (true, self::PROPERTY_TYPE_STRING, null, false)
+            'Code' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AccountID' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Name' => array (true, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/BrandingTheme.php b/src/XeroPHP/Models/Accounting/BrandingTheme.php
index 1eb2d401..4fa0aa19 100644
--- a/src/XeroPHP/Models/Accounting/BrandingTheme.php
+++ b/src/XeroPHP/Models/Accounting/BrandingTheme.php
@@ -89,15 +89,16 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'BrandingThemeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Name' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'SortOrder' => array (false, self::PROPERTY_TYPE_INT, null, false),
-            'CreatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false)
+            'BrandingThemeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Name' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'SortOrder' => array (false, self::PROPERTY_TYPE_INT, null, false, false),
+            'CreatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/Contact.php b/src/XeroPHP/Models/Accounting/Contact.php
index d3d586a8..637ce5a4 100644
--- a/src/XeroPHP/Models/Accounting/Contact.php
+++ b/src/XeroPHP/Models/Accounting/Contact.php
@@ -278,44 +278,45 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'ContactID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ContactNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'AccountNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ContactStatus' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'Name' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'FirstName' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'LastName' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'EmailAddress' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'SkypeUserName' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ContactPersons' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Contact\\ContactPerson', true),
-            'BankAccountDetails' => array (false, self::PROPERTY_TYPE_STRING, null, true),
-            'TaxNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'AccountsReceivableTaxType' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'AccountsPayableTaxType' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Addresses' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Address', true),
-            'Phones' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Phone', true),
-            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'IsSupplier' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false),
-            'IsCustomer' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false),
-            'DefaultCurrency' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'XeroNetworkKey' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'SalesDefaultAccountCode' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'PurchasesDefaultAccountCode' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'SalesTrackingCategories' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\TrackingCategory', true),
-            'PurchasesTrackingCategories' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\TrackingCategory', true),
-            'ContactGroups' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\ContactGroup', true),
-            'Website' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'BrandingTheme' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\BrandingTheme', false),
-            'BatchPayments' => array (false, self::PROPERTY_TYPE_STRING, null, true),
-            'Discount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Balances' => array (false, self::PROPERTY_TYPE_STRING, null, true),
-            'PaymentTerms' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Organisation\\PaymentTerm', true),
-            'HasAttachments' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false)
+            'ContactID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ContactNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AccountNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ContactStatus' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'Name' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'FirstName' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'LastName' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'EmailAddress' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'SkypeUserName' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ContactPersons' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Contact\\ContactPerson', true, false),
+            'BankAccountDetails' => array (false, self::PROPERTY_TYPE_STRING, null, true, false),
+            'TaxNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AccountsReceivableTaxType' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AccountsPayableTaxType' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Addresses' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Address', true, false),
+            'Phones' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Phone', true, false),
+            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'IsSupplier' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false),
+            'IsCustomer' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false),
+            'DefaultCurrency' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'XeroNetworkKey' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'SalesDefaultAccountCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'PurchasesDefaultAccountCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'SalesTrackingCategories' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\TrackingCategory', true, false),
+            'PurchasesTrackingCategories' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\TrackingCategory', true, false),
+            'ContactGroups' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\ContactGroup', true, false),
+            'Website' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'BrandingTheme' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\BrandingTheme', false, false),
+            'BatchPayments' => array (false, self::PROPERTY_TYPE_STRING, null, true, false),
+            'Discount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Balances' => array (false, self::PROPERTY_TYPE_STRING, null, true, false),
+            'PaymentTerms' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Organisation\\PaymentTerm', true, false),
+            'HasAttachments' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/Contact/ContactPerson.php b/src/XeroPHP/Models/Accounting/Contact/ContactPerson.php
index 92dce65f..6592244c 100644
--- a/src/XeroPHP/Models/Accounting/Contact/ContactPerson.php
+++ b/src/XeroPHP/Models/Accounting/Contact/ContactPerson.php
@@ -107,18 +107,19 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'FirstName' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'LastName' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'EmailAddress' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'IncludeInEmails' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false),
-            'ContactID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ContactNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Name' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'FirstName' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'LastName' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'EmailAddress' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'IncludeInEmails' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false),
+            'ContactID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ContactNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Name' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/ContactGroup.php b/src/XeroPHP/Models/Accounting/ContactGroup.php
index af63c169..2609936b 100644
--- a/src/XeroPHP/Models/Accounting/ContactGroup.php
+++ b/src/XeroPHP/Models/Accounting/ContactGroup.php
@@ -96,15 +96,16 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Name' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Status' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ContactGroupID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Contacts' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Contact', true)
+            'Name' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Status' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ContactGroupID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Contacts' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Contact', true, true)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/CreditNote.php b/src/XeroPHP/Models/Accounting/CreditNote.php
index d52194d7..e5a643e6 100644
--- a/src/XeroPHP/Models/Accounting/CreditNote.php
+++ b/src/XeroPHP/Models/Accounting/CreditNote.php
@@ -198,32 +198,33 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Reference' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Type' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'Contact' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Contact', false),
-            'Date' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'Status' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'LineAmountTypes' => array (false, self::PROPERTY_TYPE_FLOAT, null, true),
-            'LineItems' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Invoice\\LineItem', true),
-            'SubTotal' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'TotalTax' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Total' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'CurrencyCode' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'FullyPaidOnDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'CreditNoteID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'CreditNoteNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'SentToContact' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false),
-            'CurrencyRate' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'RemainingCredit' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Allocations' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\CreditNote\\Allocation', true),
-            'BrandingThemeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'HasAttachments' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false)
+            'Reference' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Type' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'Contact' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Contact', false, false),
+            'Date' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'Status' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'LineAmountTypes' => array (false, self::PROPERTY_TYPE_FLOAT, null, true, false),
+            'LineItems' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Invoice\\LineItem', true, false),
+            'SubTotal' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'TotalTax' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Total' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'CurrencyCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'FullyPaidOnDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'CreditNoteID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'CreditNoteNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'SentToContact' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false),
+            'CurrencyRate' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'RemainingCredit' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Allocations' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\CreditNote\\Allocation', true, false),
+            'BrandingThemeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'HasAttachments' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/CreditNote/Allocation.php b/src/XeroPHP/Models/Accounting/CreditNote/Allocation.php
index d38a7047..66eb1b57 100644
--- a/src/XeroPHP/Models/Accounting/CreditNote/Allocation.php
+++ b/src/XeroPHP/Models/Accounting/CreditNote/Allocation.php
@@ -84,14 +84,15 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Invoice' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Invoice', false),
-            'AppliedAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Date' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false)
+            'Invoice' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Invoice', false, false),
+            'AppliedAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Date' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/Currency.php b/src/XeroPHP/Models/Accounting/Currency.php
index 646c26e6..62990f3c 100644
--- a/src/XeroPHP/Models/Accounting/Currency.php
+++ b/src/XeroPHP/Models/Accounting/Currency.php
@@ -84,14 +84,15 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'ModifiedAfter' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'Code' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Description' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'ModifiedAfter' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'Code' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Description' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/Employee.php b/src/XeroPHP/Models/Accounting/Employee.php
index c4132f09..804eebd9 100644
--- a/src/XeroPHP/Models/Accounting/Employee.php
+++ b/src/XeroPHP/Models/Accounting/Employee.php
@@ -101,16 +101,17 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'EmployeeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Status' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'FirstName' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'LastName' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ExternalLink' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Organisation\\ExternalLink', false)
+            'EmployeeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Status' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'FirstName' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'LastName' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ExternalLink' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Organisation\\ExternalLink', false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/ExpenseClaim.php b/src/XeroPHP/Models/Accounting/ExpenseClaim.php
index 1f657f10..c6bba7e9 100644
--- a/src/XeroPHP/Models/Accounting/ExpenseClaim.php
+++ b/src/XeroPHP/Models/Accounting/ExpenseClaim.php
@@ -83,13 +83,14 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'User' => array (true, self::PROPERTY_TYPE_OBJECT, 'Accounting\\User', false),
-            'Receipts' => array (true, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Receipt', true)
+            'User' => array (true, self::PROPERTY_TYPE_OBJECT, 'Accounting\\User', false, false),
+            'Receipts' => array (true, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Receipt', true, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/ExpenseClaim/ExpenseClaim.php b/src/XeroPHP/Models/Accounting/ExpenseClaim/ExpenseClaim.php
index c351af95..440ec577 100644
--- a/src/XeroPHP/Models/Accounting/ExpenseClaim/ExpenseClaim.php
+++ b/src/XeroPHP/Models/Accounting/ExpenseClaim/ExpenseClaim.php
@@ -118,20 +118,21 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'ExpenseClaimID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Status' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'Total' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'AmountDue' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'AmountPaid' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'PaymentDueDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'ReportingDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'ReceiptID' => array (true, self::PROPERTY_TYPE_STRING, null, false)
+            'ExpenseClaimID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Status' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'Total' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'AmountDue' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'AmountPaid' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'PaymentDueDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'ReportingDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'ReceiptID' => array (true, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/Invoice.php b/src/XeroPHP/Models/Accounting/Invoice.php
index 1312ee8c..38f931d9 100644
--- a/src/XeroPHP/Models/Accounting/Invoice.php
+++ b/src/XeroPHP/Models/Accounting/Invoice.php
@@ -272,42 +272,43 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Type' => array (true, self::PROPERTY_TYPE_ENUM, null, false),
-            'Contact' => array (true, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Contact', false),
-            'LineItems' => array (true, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Invoice\\LineItem', true),
-            'Date' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'DueDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'LineAmountTypes' => array (false, self::PROPERTY_TYPE_FLOAT, null, true),
-            'InvoiceNumber' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Reference' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'BrandingThemeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Url' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'CurrencyCode' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'CurrencyRate' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Status' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'SentToContact' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false),
-            'ExpectedPaymentDate' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'PlannedPaymentDate' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'SubTotal' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'TotalTax' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Total' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'TotalDiscount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'InvoiceID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'HasAttachments' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false),
-            'Payments' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Payment', true),
-            'Prepayments' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Prepayment', true),
-            'Overpayments' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Overpayment', true),
-            'AmountDue' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'AmountPaid' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'FullyPaidOnDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'AmountCredited' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'CreditNotes' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\CreditNote', true)
+            'Type' => array (true, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'Contact' => array (true, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Contact', false, false),
+            'LineItems' => array (true, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Invoice\\LineItem', true, false),
+            'Date' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'DueDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'LineAmountTypes' => array (false, self::PROPERTY_TYPE_FLOAT, null, true, false),
+            'InvoiceNumber' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Reference' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'BrandingThemeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Url' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'CurrencyCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'CurrencyRate' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Status' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'SentToContact' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false),
+            'ExpectedPaymentDate' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'PlannedPaymentDate' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'SubTotal' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'TotalTax' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Total' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'TotalDiscount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'InvoiceID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'HasAttachments' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false),
+            'Payments' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Payment', true, false),
+            'Prepayments' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Prepayment', true, false),
+            'Overpayments' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Overpayment', true, false),
+            'AmountDue' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'AmountPaid' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'FullyPaidOnDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'AmountCredited' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'CreditNotes' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\CreditNote', true, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/Invoice/LineItem.php b/src/XeroPHP/Models/Accounting/Invoice/LineItem.php
index 4cdd8f44..3817c7d8 100644
--- a/src/XeroPHP/Models/Accounting/Invoice/LineItem.php
+++ b/src/XeroPHP/Models/Accounting/Invoice/LineItem.php
@@ -132,21 +132,22 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Description' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Quantity' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'UnitAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'ItemCode' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'AccountCode' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'TaxType' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'TaxAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'LineAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Tracking' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'DiscountRate' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'Description' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Quantity' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'UnitAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'ItemCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AccountCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'TaxType' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'TaxAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'LineAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Tracking' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'DiscountRate' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/Item.php b/src/XeroPHP/Models/Accounting/Item.php
index 1531b180..40b73353 100644
--- a/src/XeroPHP/Models/Accounting/Item.php
+++ b/src/XeroPHP/Models/Accounting/Item.php
@@ -93,15 +93,16 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Code' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'Description' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'PurchaseDetails' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Item\\Purchase', true),
-            'SalesDetails' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Organisation\\Sale', true)
+            'Code' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Description' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'PurchaseDetails' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Item\\Purchase', true, false),
+            'SalesDetails' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Organisation\\Sale', true, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/Item/Purchase.php b/src/XeroPHP/Models/Accounting/Item/Purchase.php
index 279d42ed..48b75fd1 100644
--- a/src/XeroPHP/Models/Accounting/Item/Purchase.php
+++ b/src/XeroPHP/Models/Accounting/Item/Purchase.php
@@ -89,15 +89,16 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'UnitPrice' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'AccountCode' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'TaxType' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false)
+            'UnitPrice' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AccountCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'TaxType' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/Journal.php b/src/XeroPHP/Models/Accounting/Journal.php
index 158d916b..e1355140 100644
--- a/src/XeroPHP/Models/Accounting/Journal.php
+++ b/src/XeroPHP/Models/Accounting/Journal.php
@@ -135,19 +135,20 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'JournalID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'JournalDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'JournalNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'CreatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'Reference' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'SourceID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'SourceType' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'JournalLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Journal\\JournalLine', true)
+            'JournalID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'JournalDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'JournalNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'CreatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'Reference' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'SourceID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'SourceType' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'JournalLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Journal\\JournalLine', true, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/Journal/JournalLine.php b/src/XeroPHP/Models/Accounting/Journal/JournalLine.php
index 04d2d22a..27056380 100644
--- a/src/XeroPHP/Models/Accounting/Journal/JournalLine.php
+++ b/src/XeroPHP/Models/Accounting/Journal/JournalLine.php
@@ -132,22 +132,23 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'JournalLineID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'AccountID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'AccountCode' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'AccountType' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'AccountName' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'NetAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'GrossAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'TaxAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'TaxType' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'TaxName' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\TaxRate', false),
-            'TrackingCategories' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\TrackingCategory', true)
+            'JournalLineID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AccountID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AccountCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AccountType' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'AccountName' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'NetAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'GrossAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'TaxAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'TaxType' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'TaxName' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\TaxRate', false, false),
+            'TrackingCategories' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\TrackingCategory', true, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/ManualJournal.php b/src/XeroPHP/Models/Accounting/ManualJournal.php
index 494f9168..95914332 100644
--- a/src/XeroPHP/Models/Accounting/ManualJournal.php
+++ b/src/XeroPHP/Models/Accounting/ManualJournal.php
@@ -121,19 +121,20 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Narration' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'JournalLines' => array (true, self::PROPERTY_TYPE_OBJECT, 'Accounting\\ManualJournal\\JournalLine', true),
-            'Date' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'LineAmountTypes' => array (false, self::PROPERTY_TYPE_FLOAT, null, true),
-            'Status' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'Url' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ShowOnCashBasisReports' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false),
-            'HasAttachments' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false)
+            'Narration' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'JournalLines' => array (true, self::PROPERTY_TYPE_OBJECT, 'Accounting\\ManualJournal\\JournalLine', true, false),
+            'Date' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'LineAmountTypes' => array (false, self::PROPERTY_TYPE_FLOAT, null, true, false),
+            'Status' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'Url' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ShowOnCashBasisReports' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false),
+            'HasAttachments' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/ManualJournal/JournalLine.php b/src/XeroPHP/Models/Accounting/ManualJournal/JournalLine.php
index c898276a..dfe9af1f 100644
--- a/src/XeroPHP/Models/Accounting/ManualJournal/JournalLine.php
+++ b/src/XeroPHP/Models/Accounting/ManualJournal/JournalLine.php
@@ -96,16 +96,17 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'LineAmount' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'AccountCode' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'Description' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'TaxType' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'Tracking' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'LineAmount' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AccountCode' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Description' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'TaxType' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'Tracking' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/Organisation.php b/src/XeroPHP/Models/Accounting/Organisation.php
index 1bd5cc62..92a85e09 100644
--- a/src/XeroPHP/Models/Accounting/Organisation.php
+++ b/src/XeroPHP/Models/Accounting/Organisation.php
@@ -245,37 +245,38 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'APIKey' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Name' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'LegalName' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'PaysTax' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false),
-            'Version' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'BaseCurrency' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'CountryCode' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'IsDemoCompany' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false),
-            'OrganisationStatus' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'RegistrationNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'TaxNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'FinancialYearEndDay' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'FinancialYearEndMonth' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'SalesTaxBasis' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'SalesTaxPeriod' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'PeriodLockDate' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'EndOfYearLockDate' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'CreatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'OrganisationEntityType' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'Timezone' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ShortCode' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'LineOfBusiness' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Addresses' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Address', true),
-            'Phones' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Phone', true),
-            'ExternalLinks' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Organisation\\ExternalLink', true),
-            'PaymentTerms' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Organisation\\PaymentTerm', true)
+            'APIKey' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Name' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'LegalName' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'PaysTax' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false),
+            'Version' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'BaseCurrency' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'CountryCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'IsDemoCompany' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false),
+            'OrganisationStatus' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'RegistrationNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'TaxNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'FinancialYearEndDay' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'FinancialYearEndMonth' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'SalesTaxBasis' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'SalesTaxPeriod' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'PeriodLockDate' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'EndOfYearLockDate' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'CreatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'OrganisationEntityType' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'Timezone' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ShortCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'LineOfBusiness' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Addresses' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Address', true, false),
+            'Phones' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Phone', true, false),
+            'ExternalLinks' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Organisation\\ExternalLink', true, false),
+            'PaymentTerms' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Organisation\\PaymentTerm', true, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/Organisation/Bill.php b/src/XeroPHP/Models/Accounting/Organisation/Bill.php
index b730bb04..ddb1c92f 100644
--- a/src/XeroPHP/Models/Accounting/Organisation/Bill.php
+++ b/src/XeroPHP/Models/Accounting/Organisation/Bill.php
@@ -76,13 +76,14 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Day' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Type' => array (false, self::PROPERTY_TYPE_ENUM, null, false)
+            'Day' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Type' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/Organisation/ExternalLink.php b/src/XeroPHP/Models/Accounting/Organisation/ExternalLink.php
index 9d3bcdb0..674cb5b3 100644
--- a/src/XeroPHP/Models/Accounting/Organisation/ExternalLink.php
+++ b/src/XeroPHP/Models/Accounting/Organisation/ExternalLink.php
@@ -82,13 +82,14 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'LinkType' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'URL' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'LinkType' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'URL' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/Organisation/PaymentTerm.php b/src/XeroPHP/Models/Accounting/Organisation/PaymentTerm.php
index 9de3dd66..e3d10e5b 100644
--- a/src/XeroPHP/Models/Accounting/Organisation/PaymentTerm.php
+++ b/src/XeroPHP/Models/Accounting/Organisation/PaymentTerm.php
@@ -76,13 +76,14 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Bills' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Organisation\\Bill', true),
-            'Sales' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Organisation\\Sale', true)
+            'Bills' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Organisation\\Bill', true, false),
+            'Sales' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Organisation\\Sale', true, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/Organisation/Sale.php b/src/XeroPHP/Models/Accounting/Organisation/Sale.php
index 3ee39432..a2200f97 100644
--- a/src/XeroPHP/Models/Accounting/Organisation/Sale.php
+++ b/src/XeroPHP/Models/Accounting/Organisation/Sale.php
@@ -76,13 +76,14 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Day' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Type' => array (false, self::PROPERTY_TYPE_ENUM, null, false)
+            'Day' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Type' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/Overpayment.php b/src/XeroPHP/Models/Accounting/Overpayment.php
index 8abcf7ba..234b2b59 100644
--- a/src/XeroPHP/Models/Accounting/Overpayment.php
+++ b/src/XeroPHP/Models/Accounting/Overpayment.php
@@ -185,29 +185,30 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Reference' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Type' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'Contact' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Contact', false),
-            'Date' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'Status' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'LineAmountTypes' => array (false, self::PROPERTY_TYPE_FLOAT, null, true),
-            'LineItems' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\BankTransaction\\LineItem', true),
-            'SubTotal' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'TotalTax' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Total' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'CurrencyCode' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'FullyPaidOnDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'OverpaymentID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'CurrencyRate' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'RemainingCredit' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Allocations' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Overpayment\\Allocation', true),
-            'HasAttachments' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false)
+            'Reference' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Type' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'Contact' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Contact', false, false),
+            'Date' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'Status' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'LineAmountTypes' => array (false, self::PROPERTY_TYPE_FLOAT, null, true, false),
+            'LineItems' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\BankTransaction\\LineItem', true, false),
+            'SubTotal' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'TotalTax' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Total' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'CurrencyCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'FullyPaidOnDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'OverpaymentID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'CurrencyRate' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'RemainingCredit' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Allocations' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Overpayment\\Allocation', true, false),
+            'HasAttachments' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/Overpayment/Allocation.php b/src/XeroPHP/Models/Accounting/Overpayment/Allocation.php
index 9178f384..77f1dc19 100644
--- a/src/XeroPHP/Models/Accounting/Overpayment/Allocation.php
+++ b/src/XeroPHP/Models/Accounting/Overpayment/Allocation.php
@@ -84,14 +84,15 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Invoice' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Invoice', false),
-            'AppliedAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Date' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false)
+            'Invoice' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Invoice', false, false),
+            'AppliedAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Date' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/Payment.php b/src/XeroPHP/Models/Accounting/Payment.php
index dd3573db..1ca4728a 100644
--- a/src/XeroPHP/Models/Accounting/Payment.php
+++ b/src/XeroPHP/Models/Accounting/Payment.php
@@ -167,25 +167,26 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Invoice' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Invoice', false),
-            'CreditNote' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\CreditNote', false),
-            'Prepayment' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Prepayment', false),
-            'Overpayment' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Overpayment', false),
-            'Account' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Account', false),
-            'Date' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'CurrencyRate' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Reference' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'IsReconciled' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Status' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'PaymentType' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'PaymentID' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'Invoice' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Invoice', false, false),
+            'CreditNote' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\CreditNote', false, false),
+            'Prepayment' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Prepayment', false, false),
+            'Overpayment' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Overpayment', false, false),
+            'Account' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Account', false, false),
+            'Date' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'CurrencyRate' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Reference' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'IsReconciled' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Status' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'PaymentType' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'PaymentID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/Phone.php b/src/XeroPHP/Models/Accounting/Phone.php
index d251418c..df188560 100644
--- a/src/XeroPHP/Models/Accounting/Phone.php
+++ b/src/XeroPHP/Models/Accounting/Phone.php
@@ -93,15 +93,16 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'PhoneType' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'PhoneNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'PhoneAreaCode' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'PhoneCountryCode' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'PhoneType' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'PhoneNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'PhoneAreaCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'PhoneCountryCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/Prepayment.php b/src/XeroPHP/Models/Accounting/Prepayment.php
index b22bc2f8..a3e65e64 100644
--- a/src/XeroPHP/Models/Accounting/Prepayment.php
+++ b/src/XeroPHP/Models/Accounting/Prepayment.php
@@ -185,29 +185,30 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Reference' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Type' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'Contact' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Contact', false),
-            'Date' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'Status' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'LineAmountTypes' => array (false, self::PROPERTY_TYPE_FLOAT, null, true),
-            'LineItems' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\BankTransaction\\LineItem', true),
-            'SubTotal' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'TotalTax' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Total' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'CurrencyCode' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'FullyPaidOnDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'PrepaymentID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'CurrencyRate' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'RemainingCredit' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Allocations' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Prepayment\\Allocation', true),
-            'HasAttachments' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false)
+            'Reference' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Type' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'Contact' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Contact', false, false),
+            'Date' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'Status' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'LineAmountTypes' => array (false, self::PROPERTY_TYPE_FLOAT, null, true, false),
+            'LineItems' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\BankTransaction\\LineItem', true, false),
+            'SubTotal' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'TotalTax' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Total' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'CurrencyCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'FullyPaidOnDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'PrepaymentID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'CurrencyRate' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'RemainingCredit' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Allocations' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Prepayment\\Allocation', true, false),
+            'HasAttachments' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/Prepayment/Allocation.php b/src/XeroPHP/Models/Accounting/Prepayment/Allocation.php
index cd00cad1..64ffefd6 100644
--- a/src/XeroPHP/Models/Accounting/Prepayment/Allocation.php
+++ b/src/XeroPHP/Models/Accounting/Prepayment/Allocation.php
@@ -84,14 +84,15 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Invoice' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Invoice', false),
-            'AppliedAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Date' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false)
+            'Invoice' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Invoice', false, false),
+            'AppliedAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Date' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/Receipt.php b/src/XeroPHP/Models/Accounting/Receipt.php
index c9671599..7488af7a 100644
--- a/src/XeroPHP/Models/Accounting/Receipt.php
+++ b/src/XeroPHP/Models/Accounting/Receipt.php
@@ -163,26 +163,27 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Date' => array (true, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'Contact' => array (true, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Contact', false),
-            'Lineitems' => array (true, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Receipt\\LineItem', true),
-            'User' => array (true, self::PROPERTY_TYPE_OBJECT, 'Accounting\\User', false),
-            'Reference' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'LineAmountTypes' => array (false, self::PROPERTY_TYPE_FLOAT, null, true),
-            'SubTotal' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'TotalTax' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Total' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'ReceiptID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Status' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ReceiptNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'HasAttachments' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false),
-            'Url' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'Date' => array (true, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'Contact' => array (true, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Contact', false, false),
+            'Lineitems' => array (true, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Receipt\\LineItem', true, false),
+            'User' => array (true, self::PROPERTY_TYPE_OBJECT, 'Accounting\\User', false, false),
+            'Reference' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'LineAmountTypes' => array (false, self::PROPERTY_TYPE_FLOAT, null, true, false),
+            'SubTotal' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'TotalTax' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Total' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'ReceiptID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Status' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ReceiptNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'HasAttachments' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false),
+            'Url' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/Receipt/LineItem.php b/src/XeroPHP/Models/Accounting/Receipt/LineItem.php
index 60b60e73..50becec1 100644
--- a/src/XeroPHP/Models/Accounting/Receipt/LineItem.php
+++ b/src/XeroPHP/Models/Accounting/Receipt/LineItem.php
@@ -121,19 +121,20 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Description' => array (true, self::PROPERTY_TYPE_FLOAT, null, false),
-            'UnitAmount' => array (true, self::PROPERTY_TYPE_FLOAT, null, false),
-            'AccountCode' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'Quantity' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'TaxType' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'LineAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Tracking' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'DiscountRate' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'Description' => array (true, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'UnitAmount' => array (true, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'AccountCode' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Quantity' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'TaxType' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'LineAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Tracking' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'DiscountRate' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/RepeatingInvoice.php b/src/XeroPHP/Models/Accounting/RepeatingInvoice.php
index 0b8f3f35..51b727ab 100644
--- a/src/XeroPHP/Models/Accounting/RepeatingInvoice.php
+++ b/src/XeroPHP/Models/Accounting/RepeatingInvoice.php
@@ -152,25 +152,26 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Type' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'Contact' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Contact', false),
-            'Schedule' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\RepeatingInvoice\\Schedule', false),
-            'LineItems' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\RepeatingInvoice\\LineItem', true),
-            'LineAmountTypes' => array (false, self::PROPERTY_TYPE_FLOAT, null, true),
-            'Reference' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'BrandingThemeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'CurrencyCode' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Status' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'SubTotal' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'TotalTax' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Total' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'RepeatingInvoiceID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'HasAttachments' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false)
+            'Type' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'Contact' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Contact', false, false),
+            'Schedule' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\RepeatingInvoice\\Schedule', false, false),
+            'LineItems' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\RepeatingInvoice\\LineItem', true, false),
+            'LineAmountTypes' => array (false, self::PROPERTY_TYPE_FLOAT, null, true, false),
+            'Reference' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'BrandingThemeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'CurrencyCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Status' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'SubTotal' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'TotalTax' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Total' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'RepeatingInvoiceID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'HasAttachments' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/RepeatingInvoice/LineItem.php b/src/XeroPHP/Models/Accounting/RepeatingInvoice/LineItem.php
index f652fb67..901f8498 100644
--- a/src/XeroPHP/Models/Accounting/RepeatingInvoice/LineItem.php
+++ b/src/XeroPHP/Models/Accounting/RepeatingInvoice/LineItem.php
@@ -132,21 +132,22 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Description' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Quantity' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'UnitAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'ItemCode' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'AccountCode' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'TaxType' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'TaxAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'LineAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Tracking' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'DiscountRate' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'Description' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Quantity' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'UnitAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'ItemCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AccountCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'TaxType' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'TaxAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'LineAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Tracking' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'DiscountRate' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/RepeatingInvoice/Schedule.php b/src/XeroPHP/Models/Accounting/RepeatingInvoice/Schedule.php
index d40a4695..ab3ac4fc 100644
--- a/src/XeroPHP/Models/Accounting/RepeatingInvoice/Schedule.php
+++ b/src/XeroPHP/Models/Accounting/RepeatingInvoice/Schedule.php
@@ -107,18 +107,19 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Period' => array (false, self::PROPERTY_TYPE_INT, null, false),
-            'Unit' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'DueDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'DueDateType' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Organisation\\PaymentTerm', false),
-            'StartDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'NextScheduledDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'EndDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false)
+            'Period' => array (false, self::PROPERTY_TYPE_INT, null, false, false),
+            'Unit' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'DueDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'DueDateType' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Organisation\\PaymentTerm', false, false),
+            'StartDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'NextScheduledDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'EndDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/TaxRate.php b/src/XeroPHP/Models/Accounting/TaxRate.php
index a83405be..f7d9ef73 100644
--- a/src/XeroPHP/Models/Accounting/TaxRate.php
+++ b/src/XeroPHP/Models/Accounting/TaxRate.php
@@ -140,23 +140,24 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Name' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'TaxType' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'TaxComponents' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\TaxRate\\TaxComponent', true),
-            'Status' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'ReportTaxType' => array (true, self::PROPERTY_TYPE_ENUM, null, false),
-            'CanApplyToAssets' => array (true, self::PROPERTY_TYPE_FLOAT, null, true),
-            'CanApplyToEquity' => array (true, self::PROPERTY_TYPE_FLOAT, null, false),
-            'CanApplyToExpenses' => array (true, self::PROPERTY_TYPE_FLOAT, null, true),
-            'CanApplyToLiabilities' => array (true, self::PROPERTY_TYPE_FLOAT, null, true),
-            'CanApplyToRevenue' => array (true, self::PROPERTY_TYPE_FLOAT, null, false),
-            'DisplayTaxRate' => array (true, self::PROPERTY_TYPE_FLOAT, null, false),
-            'EffectiveRate' => array (true, self::PROPERTY_TYPE_FLOAT, null, false)
+            'Name' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'TaxType' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'TaxComponents' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\TaxRate\\TaxComponent', true, false),
+            'Status' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'ReportTaxType' => array (true, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'CanApplyToAssets' => array (true, self::PROPERTY_TYPE_FLOAT, null, true, false),
+            'CanApplyToEquity' => array (true, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'CanApplyToExpenses' => array (true, self::PROPERTY_TYPE_FLOAT, null, true, false),
+            'CanApplyToLiabilities' => array (true, self::PROPERTY_TYPE_FLOAT, null, true, false),
+            'CanApplyToRevenue' => array (true, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'DisplayTaxRate' => array (true, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'EffectiveRate' => array (true, self::PROPERTY_TYPE_FLOAT, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/TaxRate/TaxComponent.php b/src/XeroPHP/Models/Accounting/TaxRate/TaxComponent.php
index ffb70899..7b7ea3ec 100644
--- a/src/XeroPHP/Models/Accounting/TaxRate/TaxComponent.php
+++ b/src/XeroPHP/Models/Accounting/TaxRate/TaxComponent.php
@@ -82,14 +82,15 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Name' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Rate' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'IsCompound' => array (false, self::PROPERTY_TYPE_FLOAT, null, false)
+            'Name' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Rate' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'IsCompound' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/TrackingCategory.php b/src/XeroPHP/Models/Accounting/TrackingCategory.php
index 854a2b8f..32b68041 100644
--- a/src/XeroPHP/Models/Accounting/TrackingCategory.php
+++ b/src/XeroPHP/Models/Accounting/TrackingCategory.php
@@ -93,15 +93,16 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'TrackingCategoryID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Name' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Status' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Options' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\TrackingCategory\\TrackingOption', true)
+            'TrackingCategoryID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Name' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Status' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Options' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\TrackingCategory\\TrackingOption', true, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/TrackingCategory/TrackingOption.php b/src/XeroPHP/Models/Accounting/TrackingCategory/TrackingOption.php
index 8b6fd8de..d7e746fe 100644
--- a/src/XeroPHP/Models/Accounting/TrackingCategory/TrackingOption.php
+++ b/src/XeroPHP/Models/Accounting/TrackingCategory/TrackingOption.php
@@ -82,14 +82,15 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'TrackingOptionID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Name' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Status' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'TrackingOptionID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Name' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Status' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Accounting/User.php b/src/XeroPHP/Models/Accounting/User.php
index 4725237f..830faec5 100644
--- a/src/XeroPHP/Models/Accounting/User.php
+++ b/src/XeroPHP/Models/Accounting/User.php
@@ -107,18 +107,19 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'UserID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'EmailAddress' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'FirstName' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'LastName' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'IsSubscriber' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false),
-            'OrganisationRole' => array (false, self::PROPERTY_TYPE_ENUM, null, false)
+            'UserID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'EmailAddress' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'FirstName' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'LastName' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'IsSubscriber' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false),
+            'OrganisationRole' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Files/Association.php b/src/XeroPHP/Models/Files/Association.php
index aef38232..64d45c9e 100644
--- a/src/XeroPHP/Models/Files/Association.php
+++ b/src/XeroPHP/Models/Files/Association.php
@@ -87,14 +87,15 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'ObjectId' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'ObjectGroup' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'ObjectType' => array (true, self::PROPERTY_TYPE_ENUM, null, false)
+            'ObjectId' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ObjectGroup' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ObjectType' => array (true, self::PROPERTY_TYPE_ENUM, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Files/File.php b/src/XeroPHP/Models/Files/File.php
index fd3305c5..ae710c82 100644
--- a/src/XeroPHP/Models/Files/File.php
+++ b/src/XeroPHP/Models/Files/File.php
@@ -117,19 +117,20 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Name' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'FolderId' => array (false, self::PROPERTY_TYPE_OBJECT, 'Files\\Folder', false),
-            'MimeType' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Size' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'CreatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'User' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Id' => array (false, self::PROPERTY_TYPE_GUID, null, false)
+            'Name' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'FolderId' => array (false, self::PROPERTY_TYPE_OBJECT, 'Files\\Folder', false, false),
+            'MimeType' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Size' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'CreatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'User' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Id' => array (false, self::PROPERTY_TYPE_GUID, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/Files/Folder.php b/src/XeroPHP/Models/Files/Folder.php
index 0a132554..2ef53d1a 100644
--- a/src/XeroPHP/Models/Files/Folder.php
+++ b/src/XeroPHP/Models/Files/Folder.php
@@ -112,18 +112,19 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Name' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'FileCount' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'Email' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'IsInbox' => array (true, self::PROPERTY_TYPE_BOOLEAN, null, false),
-            'Id' => array (true, self::PROPERTY_TYPE_GUID, null, false),
-            'Files' => array (true, self::PROPERTY_TYPE_OBJECT, 'Files\\File', true),
-            'FolderId' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'Name' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'FileCount' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Email' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'IsInbox' => array (true, self::PROPERTY_TYPE_BOOLEAN, null, false, false),
+            'Id' => array (true, self::PROPERTY_TYPE_GUID, null, false, false),
+            'Files' => array (true, self::PROPERTY_TYPE_OBJECT, 'Files\\File', true, false),
+            'FolderId' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/Employee.php b/src/XeroPHP/Models/PayrollAU/Employee.php
index 68e80aed..fb93562c 100644
--- a/src/XeroPHP/Models/PayrollAU/Employee.php
+++ b/src/XeroPHP/Models/PayrollAU/Employee.php
@@ -237,36 +237,37 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'FirstName' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'LastName' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'HomeAddress' => array (true, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Employee\\HomeAddress', false),
-            'StartDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'Title' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'MiddleNames' => array (false, self::PROPERTY_TYPE_STRING, null, true),
-            'Email' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Gender' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Mobile' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'TwitterUserName' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'IsAuthorisedToApproveLeave' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false),
-            'IsAuthorisedToApproveTimesheets' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false),
-            'Occupation' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Classification' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'OrdinaryEarningsRateID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'PayrollCalendarID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'EmployeeGroupName' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'BankAccounts' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Employee\\BankAccount', true),
-            'PayTemplate' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Employee\\PayTemplate', false),
-            'OpeningBalances' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Employee\\OpeningBalance', true),
-            'SuperMemberships' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Employee\\SuperMembership', true),
-            'TerminationDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'EmployeeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Status' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false)
+            'FirstName' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'LastName' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'HomeAddress' => array (true, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Employee\\HomeAddress', false, false),
+            'StartDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'Title' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'MiddleNames' => array (false, self::PROPERTY_TYPE_STRING, null, true, false),
+            'Email' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Gender' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Mobile' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'TwitterUserName' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'IsAuthorisedToApproveLeave' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false),
+            'IsAuthorisedToApproveTimesheets' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false),
+            'Occupation' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Classification' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'OrdinaryEarningsRateID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'PayrollCalendarID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'EmployeeGroupName' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'BankAccounts' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Employee\\BankAccount', true, false),
+            'PayTemplate' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Employee\\PayTemplate', false, false),
+            'OpeningBalances' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Employee\\OpeningBalance', true, false),
+            'SuperMemberships' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Employee\\SuperMembership', true, false),
+            'TerminationDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'EmployeeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Status' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/Employee/BankAccount.php b/src/XeroPHP/Models/PayrollAU/Employee/BankAccount.php
index 48fa9822..4a4d1fd8 100644
--- a/src/XeroPHP/Models/PayrollAU/Employee/BankAccount.php
+++ b/src/XeroPHP/Models/PayrollAU/Employee/BankAccount.php
@@ -102,17 +102,18 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'StatementText' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'AccountName' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'BSB' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'AccountNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Remainder' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false)
+            'StatementText' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AccountName' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'BSB' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AccountNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Remainder' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/Employee/HomeAddress.php b/src/XeroPHP/Models/PayrollAU/Employee/HomeAddress.php
index 971ab7ad..d59d09f4 100644
--- a/src/XeroPHP/Models/PayrollAU/Employee/HomeAddress.php
+++ b/src/XeroPHP/Models/PayrollAU/Employee/HomeAddress.php
@@ -100,17 +100,18 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'AddressLine1' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'AddressLine2' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'City' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Region' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'PostalCode' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Country' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'AddressLine1' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AddressLine2' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'City' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Region' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'PostalCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Country' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/Employee/OpeningBalance.php b/src/XeroPHP/Models/PayrollAU/Employee/OpeningBalance.php
index a8f38959..0df7315a 100644
--- a/src/XeroPHP/Models/PayrollAU/Employee/OpeningBalance.php
+++ b/src/XeroPHP/Models/PayrollAU/Employee/OpeningBalance.php
@@ -157,26 +157,27 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'OpeningBalanceDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'Tax' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'EarningsLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip\\EarningsLine', true),
-            'DeductionLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip\\DeductionLine', true),
-            'SuperLines' => array (false, self::PROPERTY_TYPE_STRING, null, true),
-            'ReimbursementLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip\\ReimbursementLine', true),
-            'LeaveLines' => array (false, self::PROPERTY_TYPE_STRING, null, true),
-            'EarningsRateID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'DeductionTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'SuperMembershipID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'CalculationType' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ReimbursementTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'LeaveTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'NumberOfUnits' => array (false, self::PROPERTY_TYPE_STRING, null, true)
+            'OpeningBalanceDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'Tax' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'EarningsLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip\\EarningsLine', true, false),
+            'DeductionLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip\\DeductionLine', true, false),
+            'SuperLines' => array (false, self::PROPERTY_TYPE_STRING, null, true, false),
+            'ReimbursementLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip\\ReimbursementLine', true, false),
+            'LeaveLines' => array (false, self::PROPERTY_TYPE_STRING, null, true, false),
+            'EarningsRateID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'DeductionTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'SuperMembershipID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'CalculationType' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ReimbursementTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'LeaveTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'NumberOfUnits' => array (false, self::PROPERTY_TYPE_STRING, null, true, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/Employee/PayTemplate.php b/src/XeroPHP/Models/PayrollAU/Employee/PayTemplate.php
index d52e4f55..3c3469e6 100644
--- a/src/XeroPHP/Models/PayrollAU/Employee/PayTemplate.php
+++ b/src/XeroPHP/Models/PayrollAU/Employee/PayTemplate.php
@@ -216,36 +216,37 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'EarningsLines' => array (false, self::PROPERTY_TYPE_FLOAT, null, true),
-            'DeductionLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip\\DeductionLine', true),
-            'SuperLines' => array (false, self::PROPERTY_TYPE_STRING, null, true),
-            'ReimbursementLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip\\ReimbursementLine', true),
-            'LeaveLines' => array (false, self::PROPERTY_TYPE_STRING, null, true),
-            'EarningsRateID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'CalculationType' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'NumberOfUnitsPerWeek' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'AnnualSalary' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'RatePerUnit' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'NormalNumberOfUnits' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'DeductionTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Percentage' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'SuperMembershipID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ContributionType' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'ExpenseAccountCode' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'LiabilityAccountCode' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'MinimumMonthlyEarnings' => array (false, self::PROPERTY_TYPE_STRING, null, true),
-            'ReimbursementTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Description' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'LeaveTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'AnnualNumberOfUnits' => array (false, self::PROPERTY_TYPE_STRING, null, true),
-            'FullTimeNumberOfUnitsPerPeriod' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'NumberOfUnits' => array (false, self::PROPERTY_TYPE_STRING, null, true)
+            'EarningsLines' => array (false, self::PROPERTY_TYPE_FLOAT, null, true, false),
+            'DeductionLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip\\DeductionLine', true, false),
+            'SuperLines' => array (false, self::PROPERTY_TYPE_STRING, null, true, false),
+            'ReimbursementLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip\\ReimbursementLine', true, false),
+            'LeaveLines' => array (false, self::PROPERTY_TYPE_STRING, null, true, false),
+            'EarningsRateID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'CalculationType' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'NumberOfUnitsPerWeek' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'AnnualSalary' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'RatePerUnit' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'NormalNumberOfUnits' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'DeductionTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Percentage' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'SuperMembershipID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ContributionType' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'ExpenseAccountCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'LiabilityAccountCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'MinimumMonthlyEarnings' => array (false, self::PROPERTY_TYPE_STRING, null, true, false),
+            'ReimbursementTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Description' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'LeaveTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AnnualNumberOfUnits' => array (false, self::PROPERTY_TYPE_STRING, null, true, false),
+            'FullTimeNumberOfUnitsPerPeriod' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'NumberOfUnits' => array (false, self::PROPERTY_TYPE_STRING, null, true, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/Employee/SuperMembership.php b/src/XeroPHP/Models/PayrollAU/Employee/SuperMembership.php
index 86932061..b558c23c 100644
--- a/src/XeroPHP/Models/PayrollAU/Employee/SuperMembership.php
+++ b/src/XeroPHP/Models/PayrollAU/Employee/SuperMembership.php
@@ -104,17 +104,18 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'SuperFundID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'EmployeeNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'SuperMembershipID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Recordfilter' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'EmployeeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ModifiedAfter' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false)
+            'SuperFundID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'EmployeeNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'SuperMembershipID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Recordfilter' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'EmployeeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ModifiedAfter' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/Employee/TaxDeclaration.php b/src/XeroPHP/Models/PayrollAU/Employee/TaxDeclaration.php
index 93b0bd84..ee7691ce 100644
--- a/src/XeroPHP/Models/PayrollAU/Employee/TaxDeclaration.php
+++ b/src/XeroPHP/Models/PayrollAU/Employee/TaxDeclaration.php
@@ -148,23 +148,24 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'EmployeeID' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'EmploymentBasis' => array (true, self::PROPERTY_TYPE_ENUM, null, false),
-            'TFNExemptionType' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'TaxFileNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'AustralianResidentForTaxPurposes' => array (false, self::PROPERTY_TYPE_STRING, null, true),
-            'TaxFreeThresholdClaimed' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'TaxOffsetEstimatedAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'HasHELPDebt' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'HasSFSSDebt' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'UpwardVariationTaxWithholdingAmount' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'EligibleToReceiveLeaveLoading' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ApprovedWithholdingVariationPercentage' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'EmployeeID' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'EmploymentBasis' => array (true, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'TFNExemptionType' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'TaxFileNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AustralianResidentForTaxPurposes' => array (false, self::PROPERTY_TYPE_STRING, null, true, false),
+            'TaxFreeThresholdClaimed' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'TaxOffsetEstimatedAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'HasHELPDebt' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'HasSFSSDebt' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'UpwardVariationTaxWithholdingAmount' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'EligibleToReceiveLeaveLoading' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ApprovedWithholdingVariationPercentage' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/LeaveApplication.php b/src/XeroPHP/Models/PayrollAU/LeaveApplication.php
index 0f8bddd9..9b3be2e5 100644
--- a/src/XeroPHP/Models/PayrollAU/LeaveApplication.php
+++ b/src/XeroPHP/Models/PayrollAU/LeaveApplication.php
@@ -112,18 +112,19 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'EmployeeID' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'LeaveTypeID' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'Title' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'StartDate' => array (true, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'EndDate' => array (true, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'Description' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'LeavePeriods' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\LeaveApplication\\LeavePeriod', true)
+            'EmployeeID' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'LeaveTypeID' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Title' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'StartDate' => array (true, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'EndDate' => array (true, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'Description' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'LeavePeriods' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\LeaveApplication\\LeavePeriod', true, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/LeaveApplication/LeavePeriod.php b/src/XeroPHP/Models/PayrollAU/LeaveApplication/LeavePeriod.php
index 110e95f5..f74aa407 100644
--- a/src/XeroPHP/Models/PayrollAU/LeaveApplication/LeavePeriod.php
+++ b/src/XeroPHP/Models/PayrollAU/LeaveApplication/LeavePeriod.php
@@ -88,15 +88,16 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'NumberOfUnits' => array (false, self::PROPERTY_TYPE_STRING, null, true),
-            'PayPeriodEndDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'PayPeriodStartDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'LeavePeriodStatus' => array (false, self::PROPERTY_TYPE_ENUM, null, false)
+            'NumberOfUnits' => array (false, self::PROPERTY_TYPE_STRING, null, true, false),
+            'PayPeriodEndDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'PayPeriodStartDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'LeavePeriodStatus' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/PayItem.php b/src/XeroPHP/Models/PayrollAU/PayItem.php
index ca4ee848..91d9753d 100644
--- a/src/XeroPHP/Models/PayrollAU/PayItem.php
+++ b/src/XeroPHP/Models/PayrollAU/PayItem.php
@@ -94,15 +94,16 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'EarningsRates' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\PayItem\\EarningsRate', true),
-            'DeductionTypes' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\PayItem\\DeductionType', true),
-            'LeaveTypes' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\PayItem\\LeaveType', true),
-            'ReimbursementTypes' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\PayItem\\ReimbursementType', true)
+            'EarningsRates' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\PayItem\\EarningsRate', true, false),
+            'DeductionTypes' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\PayItem\\DeductionType', true, false),
+            'LeaveTypes' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\PayItem\\LeaveType', true, false),
+            'ReimbursementTypes' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\PayItem\\ReimbursementType', true, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/PayItem/DeductionType.php b/src/XeroPHP/Models/PayrollAU/PayItem/DeductionType.php
index 10f9b58f..fb039366 100644
--- a/src/XeroPHP/Models/PayrollAU/PayItem/DeductionType.php
+++ b/src/XeroPHP/Models/PayrollAU/PayItem/DeductionType.php
@@ -96,16 +96,17 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Name' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'AccountCode' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'ReducesTax' => array (true, self::PROPERTY_TYPE_FLOAT, null, false),
-            'ReducesSuper' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'DeductionTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'Name' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AccountCode' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ReducesTax' => array (true, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'ReducesSuper' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'DeductionTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/PayItem/EarningsRate.php b/src/XeroPHP/Models/PayrollAU/PayItem/EarningsRate.php
index d0c6e056..97d2d652 100644
--- a/src/XeroPHP/Models/PayrollAU/PayItem/EarningsRate.php
+++ b/src/XeroPHP/Models/PayrollAU/PayItem/EarningsRate.php
@@ -154,24 +154,25 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Name' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'DisplayName' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'AccountCode' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'TypeOfUnits' => array (true, self::PROPERTY_TYPE_STRING, null, true),
-            'IsExemptFromTax' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'IsExemptFromSuper' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'EarningsType' => array (true, self::PROPERTY_TYPE_ENUM, null, false),
-            'EarningsRateID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'RateType' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'RatePerUnit' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Multiplier' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'AccrueLeave' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false)
+            'Name' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'DisplayName' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AccountCode' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'TypeOfUnits' => array (true, self::PROPERTY_TYPE_STRING, null, true, false),
+            'IsExemptFromTax' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'IsExemptFromSuper' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'EarningsType' => array (true, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'EarningsRateID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'RateType' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'RatePerUnit' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Multiplier' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'AccrueLeave' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/PayItem/LeaveType.php b/src/XeroPHP/Models/PayrollAU/PayItem/LeaveType.php
index 6f31a68b..d965a911 100644
--- a/src/XeroPHP/Models/PayrollAU/PayItem/LeaveType.php
+++ b/src/XeroPHP/Models/PayrollAU/PayItem/LeaveType.php
@@ -108,18 +108,19 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Name' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'TypeOfUnits' => array (true, self::PROPERTY_TYPE_FLOAT, null, true),
-            'IsPaidLeave' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'ShowOnPayslip' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'LeaveTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'NormalEntitlement' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'LeaveLoadingRate' => array (false, self::PROPERTY_TYPE_FLOAT, null, false)
+            'Name' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'TypeOfUnits' => array (true, self::PROPERTY_TYPE_FLOAT, null, true, false),
+            'IsPaidLeave' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ShowOnPayslip' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'LeaveTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'NormalEntitlement' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'LeaveLoadingRate' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/PayItem/ReimbursementType.php b/src/XeroPHP/Models/PayrollAU/PayItem/ReimbursementType.php
index 723b10fe..ef9ac975 100644
--- a/src/XeroPHP/Models/PayrollAU/PayItem/ReimbursementType.php
+++ b/src/XeroPHP/Models/PayrollAU/PayItem/ReimbursementType.php
@@ -82,14 +82,15 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Name' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'AccountCode' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'ReimbursementTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'Name' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AccountCode' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ReimbursementTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/PayRun.php b/src/XeroPHP/Models/PayrollAU/PayRun.php
index 03f8a98b..560478a8 100644
--- a/src/XeroPHP/Models/PayrollAU/PayRun.php
+++ b/src/XeroPHP/Models/PayrollAU/PayRun.php
@@ -150,25 +150,26 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'PayrollCalendarID' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'PayRunID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'PayRunPeriodStartDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'PayRunPeriodEndDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'PayRunStatus' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'PaymentDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'PayslipMessage' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Payslips' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip', true),
-            'Wages' => array (false, self::PROPERTY_TYPE_STRING, null, true),
-            'Deductions' => array (false, self::PROPERTY_TYPE_STRING, null, true),
-            'Tax' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Super' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Reimbursement' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'NetPay' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'PayrollCalendarID' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'PayRunID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'PayRunPeriodStartDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'PayRunPeriodEndDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'PayRunStatus' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'PaymentDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'PayslipMessage' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Payslips' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip', true, false),
+            'Wages' => array (false, self::PROPERTY_TYPE_STRING, null, true, false),
+            'Deductions' => array (false, self::PROPERTY_TYPE_STRING, null, true, false),
+            'Tax' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Super' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Reimbursement' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'NetPay' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/PayrollCalendar.php b/src/XeroPHP/Models/PayrollAU/PayrollCalendar.php
index 135a5e59..33ba1069 100644
--- a/src/XeroPHP/Models/PayrollAU/PayrollCalendar.php
+++ b/src/XeroPHP/Models/PayrollAU/PayrollCalendar.php
@@ -98,15 +98,16 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Name' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'CalendarType' => array (true, self::PROPERTY_TYPE_ENUM, null, false),
-            'StartDate' => array (true, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'PaymentDate' => array (true, self::PROPERTY_TYPE_DATE, '\\DateTime', false)
+            'Name' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'CalendarType' => array (true, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'StartDate' => array (true, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'PaymentDate' => array (true, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/Payslip.php b/src/XeroPHP/Models/PayrollAU/Payslip.php
index 1203d7da..b84aff22 100644
--- a/src/XeroPHP/Models/PayrollAU/Payslip.php
+++ b/src/XeroPHP/Models/PayrollAU/Payslip.php
@@ -194,31 +194,32 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'EmployeeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'PayslipID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'EarningsLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip\\EarningsLine', true),
-            'TimesheetEarningsLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip\\TimesheetEarningsLine', true),
-            'DeductionLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip\\DeductionLine', true),
-            'LeaveAccrualLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip\\LeaveAccrualLine', true),
-            'ReimbursementLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip\\ReimbursementLine', true),
-            'SuperannuationLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip\\SuperannuationLine', true),
-            'TaxLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip\\TaxLine', true),
-            'FirstName' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'LastName' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'EmployeeGroup' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'LastEdited' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Wages' => array (false, self::PROPERTY_TYPE_FLOAT, null, true),
-            'Deductions' => array (false, self::PROPERTY_TYPE_FLOAT, null, true),
-            'NetPay' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Tax' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Super' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Reimbursements' => array (false, self::PROPERTY_TYPE_FLOAT, null, true),
-            'LeaveEarningsLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip\\LeaveEarningsLine', true)
+            'EmployeeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'PayslipID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'EarningsLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip\\EarningsLine', true, false),
+            'TimesheetEarningsLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip\\TimesheetEarningsLine', true, false),
+            'DeductionLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip\\DeductionLine', true, false),
+            'LeaveAccrualLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip\\LeaveAccrualLine', true, false),
+            'ReimbursementLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip\\ReimbursementLine', true, false),
+            'SuperannuationLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip\\SuperannuationLine', true, false),
+            'TaxLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip\\TaxLine', true, false),
+            'FirstName' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'LastName' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'EmployeeGroup' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'LastEdited' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Wages' => array (false, self::PROPERTY_TYPE_FLOAT, null, true, false),
+            'Deductions' => array (false, self::PROPERTY_TYPE_FLOAT, null, true, false),
+            'NetPay' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Tax' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Super' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Reimbursements' => array (false, self::PROPERTY_TYPE_FLOAT, null, true, false),
+            'LeaveEarningsLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Payslip\\LeaveEarningsLine', true, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/Payslip/DeductionLine.php b/src/XeroPHP/Models/PayrollAU/Payslip/DeductionLine.php
index 9c6e6b1b..a748a732 100644
--- a/src/XeroPHP/Models/PayrollAU/Payslip/DeductionLine.php
+++ b/src/XeroPHP/Models/PayrollAU/Payslip/DeductionLine.php
@@ -88,15 +88,16 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'DeductionTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'CalculationType' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Percentage' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'NumberOfUnits' => array (false, self::PROPERTY_TYPE_FLOAT, null, true)
+            'DeductionTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'CalculationType' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Percentage' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'NumberOfUnits' => array (false, self::PROPERTY_TYPE_FLOAT, null, true, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/Payslip/EarningsLine.php b/src/XeroPHP/Models/PayrollAU/Payslip/EarningsLine.php
index 9513ed6c..628aaaa1 100644
--- a/src/XeroPHP/Models/PayrollAU/Payslip/EarningsLine.php
+++ b/src/XeroPHP/Models/PayrollAU/Payslip/EarningsLine.php
@@ -88,15 +88,16 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'EarningsRateID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'RatePerUnit' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'NumberOfUnits' => array (false, self::PROPERTY_TYPE_FLOAT, null, true),
-            'FixedAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false)
+            'EarningsRateID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'RatePerUnit' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'NumberOfUnits' => array (false, self::PROPERTY_TYPE_FLOAT, null, true, false),
+            'FixedAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/Payslip/LeaveAccrualLine.php b/src/XeroPHP/Models/PayrollAU/Payslip/LeaveAccrualLine.php
index 09b5c90e..07521274 100644
--- a/src/XeroPHP/Models/PayrollAU/Payslip/LeaveAccrualLine.php
+++ b/src/XeroPHP/Models/PayrollAU/Payslip/LeaveAccrualLine.php
@@ -82,14 +82,15 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'LeaveTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'NumberOfUnits' => array (false, self::PROPERTY_TYPE_STRING, null, true),
-            'AutoCalculate' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'LeaveTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'NumberOfUnits' => array (false, self::PROPERTY_TYPE_STRING, null, true, false),
+            'AutoCalculate' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/Payslip/LeaveEarningsLine.php b/src/XeroPHP/Models/PayrollAU/Payslip/LeaveEarningsLine.php
index e8d0b94e..4214a919 100644
--- a/src/XeroPHP/Models/PayrollAU/Payslip/LeaveEarningsLine.php
+++ b/src/XeroPHP/Models/PayrollAU/Payslip/LeaveEarningsLine.php
@@ -82,14 +82,15 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'EarningsRateID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'RatePerUnit' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'NumberOfUnits' => array (false, self::PROPERTY_TYPE_FLOAT, null, true)
+            'EarningsRateID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'RatePerUnit' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'NumberOfUnits' => array (false, self::PROPERTY_TYPE_FLOAT, null, true, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/Payslip/ReimbursementLine.php b/src/XeroPHP/Models/PayrollAU/Payslip/ReimbursementLine.php
index 147d1cb2..fc2a246f 100644
--- a/src/XeroPHP/Models/PayrollAU/Payslip/ReimbursementLine.php
+++ b/src/XeroPHP/Models/PayrollAU/Payslip/ReimbursementLine.php
@@ -88,15 +88,16 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'ReimbursementTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Description' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ExpenseAccount' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false)
+            'ReimbursementTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Description' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ExpenseAccount' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/Payslip/SuperannuationLine.php b/src/XeroPHP/Models/PayrollAU/Payslip/SuperannuationLine.php
index c6d7a335..10cef594 100644
--- a/src/XeroPHP/Models/PayrollAU/Payslip/SuperannuationLine.php
+++ b/src/XeroPHP/Models/PayrollAU/Payslip/SuperannuationLine.php
@@ -118,20 +118,21 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'SuperMembershipID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ContributionType' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'CalculationType' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'MinimumMonthlyEarnings' => array (false, self::PROPERTY_TYPE_STRING, null, true),
-            'ExpenseAccountCode' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'LiabilityAccountCode' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'PaymentDateForThisPeriod' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'Percentage' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false)
+            'SuperMembershipID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ContributionType' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'CalculationType' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'MinimumMonthlyEarnings' => array (false, self::PROPERTY_TYPE_STRING, null, true, false),
+            'ExpenseAccountCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'LiabilityAccountCode' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'PaymentDateForThisPeriod' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'Percentage' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/Payslip/TaxLine.php b/src/XeroPHP/Models/PayrollAU/Payslip/TaxLine.php
index a401dddf..3c73bdf4 100644
--- a/src/XeroPHP/Models/PayrollAU/Payslip/TaxLine.php
+++ b/src/XeroPHP/Models/PayrollAU/Payslip/TaxLine.php
@@ -89,15 +89,16 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'TaxTypeName' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Description' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'LiabilityAccount' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'TaxTypeName' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Description' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'LiabilityAccount' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/Payslip/TimesheetEarningsLine.php b/src/XeroPHP/Models/PayrollAU/Payslip/TimesheetEarningsLine.php
index c7f1a83e..47f3f4b6 100644
--- a/src/XeroPHP/Models/PayrollAU/Payslip/TimesheetEarningsLine.php
+++ b/src/XeroPHP/Models/PayrollAU/Payslip/TimesheetEarningsLine.php
@@ -82,14 +82,15 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'EarningsRateID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'RatePerUnit' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false)
+            'EarningsRateID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'RatePerUnit' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/Setting.php b/src/XeroPHP/Models/PayrollAU/Setting.php
index f020defc..50ae70b7 100644
--- a/src/XeroPHP/Models/PayrollAU/Setting.php
+++ b/src/XeroPHP/Models/PayrollAU/Setting.php
@@ -86,14 +86,15 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Accounts' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Setting\\Account', true),
-            'TrackingCategories' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Setting\\TrackingCategory', true),
-            'DaysInPayrollYear' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'Accounts' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Setting\\Account', true, false),
+            'TrackingCategories' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Setting\\TrackingCategory', true, false),
+            'DaysInPayrollYear' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/Setting/Account.php b/src/XeroPHP/Models/PayrollAU/Setting/Account.php
index b9cdb1e5..0e4a354c 100644
--- a/src/XeroPHP/Models/PayrollAU/Setting/Account.php
+++ b/src/XeroPHP/Models/PayrollAU/Setting/Account.php
@@ -88,15 +88,16 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'AccountID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Type' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'Code' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Name' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'AccountID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Type' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'Code' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Name' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/Setting/TrackingCategory.php b/src/XeroPHP/Models/PayrollAU/Setting/TrackingCategory.php
index f6540b68..c649bb15 100644
--- a/src/XeroPHP/Models/PayrollAU/Setting/TrackingCategory.php
+++ b/src/XeroPHP/Models/PayrollAU/Setting/TrackingCategory.php
@@ -76,13 +76,14 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'TrackingCategoryID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'TrackingCategoryName' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'TrackingCategoryID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'TrackingCategoryName' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/SuperFund.php b/src/XeroPHP/Models/PayrollAU/SuperFund.php
index 5e9ac274..78d40e2e 100644
--- a/src/XeroPHP/Models/PayrollAU/SuperFund.php
+++ b/src/XeroPHP/Models/PayrollAU/SuperFund.php
@@ -84,14 +84,15 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Type' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'ABN' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'USI' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'Type' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'ABN' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'USI' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/SuperFund/SuperFund.php b/src/XeroPHP/Models/PayrollAU/SuperFund/SuperFund.php
index 5e6ccb8a..45ddb172 100644
--- a/src/XeroPHP/Models/PayrollAU/SuperFund/SuperFund.php
+++ b/src/XeroPHP/Models/PayrollAU/SuperFund/SuperFund.php
@@ -147,23 +147,24 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Type' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'Name' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ABN' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'BSB' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'AccountNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'AccountName' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'SuperFundID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'EmployerNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'SPIN' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Recordfilter' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            '' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ModifiedAfter' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false)
+            'Type' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'Name' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ABN' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'BSB' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AccountNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AccountName' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'SuperFundID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'EmployerNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'SPIN' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Recordfilter' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            '' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ModifiedAfter' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/SuperFundProduct.php b/src/XeroPHP/Models/PayrollAU/SuperFundProduct.php
index 73664846..f82def50 100644
--- a/src/XeroPHP/Models/PayrollAU/SuperFundProduct.php
+++ b/src/XeroPHP/Models/PayrollAU/SuperFundProduct.php
@@ -91,15 +91,16 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'ABN' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'USI' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'SPIN' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ProductName' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'ABN' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'USI' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'SPIN' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ProductName' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/Timesheet.php b/src/XeroPHP/Models/PayrollAU/Timesheet.php
index 0c424b39..bc7b9e1a 100644
--- a/src/XeroPHP/Models/PayrollAU/Timesheet.php
+++ b/src/XeroPHP/Models/PayrollAU/Timesheet.php
@@ -113,18 +113,19 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'EmployeeID' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'StartDate' => array (true, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'EndDate' => array (true, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'TimesheetLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Timesheet\\TimesheetLine', true),
-            'Status' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'Hours' => array (false, self::PROPERTY_TYPE_STRING, null, true),
-            'TimesheetID' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'EmployeeID' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'StartDate' => array (true, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'EndDate' => array (true, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'TimesheetLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollAU\\Timesheet\\TimesheetLine', true, false),
+            'Status' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'Hours' => array (false, self::PROPERTY_TYPE_STRING, null, true, false),
+            'TimesheetID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollAU/Timesheet/TimesheetLine.php b/src/XeroPHP/Models/PayrollAU/Timesheet/TimesheetLine.php
index 09e35aae..b385013f 100644
--- a/src/XeroPHP/Models/PayrollAU/Timesheet/TimesheetLine.php
+++ b/src/XeroPHP/Models/PayrollAU/Timesheet/TimesheetLine.php
@@ -83,14 +83,15 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'EarningsRateID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'TrackingItemID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'NumberOfUnits' => array (false, self::PROPERTY_TYPE_STRING, null, true)
+            'EarningsRateID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'TrackingItemID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'NumberOfUnits' => array (false, self::PROPERTY_TYPE_STRING, null, true, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/Employee.php b/src/XeroPHP/Models/PayrollUS/Employee.php
index f8260f35..466c03e8 100644
--- a/src/XeroPHP/Models/PayrollUS/Employee.php
+++ b/src/XeroPHP/Models/PayrollUS/Employee.php
@@ -235,38 +235,39 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'FirstName' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'LastName' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'DateOfBirth' => array (true, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'HomeAddress' => array (true, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Employee\\HomeAddress', false),
-            'MiddleNames' => array (false, self::PROPERTY_TYPE_STRING, null, true),
-            'JobTitle' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Email' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Gender' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'MailingAddress' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Employee\\MailingAddress', false),
-            'Phone' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'EmployeeNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'SocialSecurityNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'StartDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'PayScheduleID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'EmployeeGroupName' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'EmploymentBasis' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'HolidayGroupID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'IsAuthorisedToApproveTimeOff' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false),
-            'IsAuthorisedToApproveTimesheets' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false),
-            'SalaryAndWages' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Employee\\SalaryAndWage', true),
-            'WorkLocations' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Employee\\WorkLocation', true),
-            'PaymentMethod' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Employee\\PaymentMethod', false),
-            'PayTemplate' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Employee\\PayTemplate', false),
-            'OpeningBalances' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Employee\\OpeningBalance', true),
-            'EmployeeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Status' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false)
+            'FirstName' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'LastName' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'DateOfBirth' => array (true, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'HomeAddress' => array (true, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Employee\\HomeAddress', false, false),
+            'MiddleNames' => array (false, self::PROPERTY_TYPE_STRING, null, true, false),
+            'JobTitle' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Email' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Gender' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'MailingAddress' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Employee\\MailingAddress', false, false),
+            'Phone' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'EmployeeNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'SocialSecurityNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'StartDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'PayScheduleID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'EmployeeGroupName' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'EmploymentBasis' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'HolidayGroupID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'IsAuthorisedToApproveTimeOff' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false),
+            'IsAuthorisedToApproveTimesheets' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false),
+            'SalaryAndWages' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Employee\\SalaryAndWage', true, false),
+            'WorkLocations' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Employee\\WorkLocation', true, false),
+            'PaymentMethod' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Employee\\PaymentMethod', false, false),
+            'PayTemplate' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Employee\\PayTemplate', false, false),
+            'OpeningBalances' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Employee\\OpeningBalance', true, false),
+            'EmployeeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Status' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/Employee/BankAccount.php b/src/XeroPHP/Models/PayrollUS/Employee/BankAccount.php
index 041f7d92..be220356 100644
--- a/src/XeroPHP/Models/PayrollUS/Employee/BankAccount.php
+++ b/src/XeroPHP/Models/PayrollUS/Employee/BankAccount.php
@@ -107,18 +107,19 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'AccountHolderName' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'StatementText' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'AccountType' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'RoutingNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'AccountNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Remainder' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'AccountHolderName' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'StatementText' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AccountType' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'RoutingNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'AccountNumber' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Remainder' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/Employee/HomeAddress.php b/src/XeroPHP/Models/PayrollUS/Employee/HomeAddress.php
index 52cb401b..4cf1c7a9 100644
--- a/src/XeroPHP/Models/PayrollUS/Employee/HomeAddress.php
+++ b/src/XeroPHP/Models/PayrollUS/Employee/HomeAddress.php
@@ -106,18 +106,19 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'StreetAddress' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'SuiteOrAptOrUnit' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'City' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'State' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Zip' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Lattitude' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Longitude' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'StreetAddress' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'SuiteOrAptOrUnit' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'City' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'State' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Zip' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Lattitude' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Longitude' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/Employee/MailingAddress.php b/src/XeroPHP/Models/PayrollUS/Employee/MailingAddress.php
index b4e1c1a1..7246a1e6 100644
--- a/src/XeroPHP/Models/PayrollUS/Employee/MailingAddress.php
+++ b/src/XeroPHP/Models/PayrollUS/Employee/MailingAddress.php
@@ -106,18 +106,19 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'StreetAddress' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'SuiteOrAptOrUnit' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'City' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'State' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Zip' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Lattitude' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Longitude' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'StreetAddress' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'SuiteOrAptOrUnit' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'City' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'State' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Zip' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Lattitude' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Longitude' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/Employee/OpeningBalance.php b/src/XeroPHP/Models/PayrollUS/Employee/OpeningBalance.php
index 98568199..7398753f 100644
--- a/src/XeroPHP/Models/PayrollUS/Employee/OpeningBalance.php
+++ b/src/XeroPHP/Models/PayrollUS/Employee/OpeningBalance.php
@@ -144,23 +144,24 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'EarningsLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\EarningsLine', true),
-            'BenefitLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\BenefitLine', true),
-            'DeductionLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\DeductionLine', true),
-            'ReimbursementLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\ReimbursementLine', true),
-            'EarningsTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'BenefitTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'DeductionTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ReimbursementTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Recordfilter' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'EmployeeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ModifiedAfter' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false)
+            'EarningsLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\EarningsLine', true, false),
+            'BenefitLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\BenefitLine', true, false),
+            'DeductionLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\DeductionLine', true, false),
+            'ReimbursementLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\ReimbursementLine', true, false),
+            'EarningsTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'BenefitTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'DeductionTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ReimbursementTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Recordfilter' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'EmployeeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ModifiedAfter' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/Employee/PayTemplate.php b/src/XeroPHP/Models/PayrollUS/Employee/PayTemplate.php
index 74a4b840..d54dedc7 100644
--- a/src/XeroPHP/Models/PayrollUS/Employee/PayTemplate.php
+++ b/src/XeroPHP/Models/PayrollUS/Employee/PayTemplate.php
@@ -164,26 +164,27 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'EarningsLines' => array (false, self::PROPERTY_TYPE_FLOAT, null, true),
-            'DeductionLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\DeductionLine', true),
-            'ReimbursementLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\ReimbursementLine', true),
-            'BenefitLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\BenefitLine', true),
-            'EarningsTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'UnitsOrHours' => array (false, self::PROPERTY_TYPE_STRING, null, true),
-            'RatePerUnit' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'DeductionTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'CalculationType' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'EmployeeMax' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Percentage' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ReimbursementTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Description' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'BenefitTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'EarningsLines' => array (false, self::PROPERTY_TYPE_FLOAT, null, true, false),
+            'DeductionLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\DeductionLine', true, false),
+            'ReimbursementLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\ReimbursementLine', true, false),
+            'BenefitLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\BenefitLine', true, false),
+            'EarningsTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'UnitsOrHours' => array (false, self::PROPERTY_TYPE_STRING, null, true, false),
+            'RatePerUnit' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'DeductionTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'CalculationType' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'EmployeeMax' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Percentage' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ReimbursementTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Description' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'BenefitTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/Employee/PaymentMethod.php b/src/XeroPHP/Models/PayrollUS/Employee/PaymentMethod.php
index 3ce02c82..bd65d022 100644
--- a/src/XeroPHP/Models/PayrollUS/Employee/PaymentMethod.php
+++ b/src/XeroPHP/Models/PayrollUS/Employee/PaymentMethod.php
@@ -80,13 +80,14 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'PaymentMethodType' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'BankAccounts' => array (false, self::PROPERTY_TYPE_ENUM, null, false)
+            'PaymentMethodType' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'BankAccounts' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/Employee/SalaryAndWage.php b/src/XeroPHP/Models/PayrollUS/Employee/SalaryAndWage.php
index 3f783570..a58ab9cb 100644
--- a/src/XeroPHP/Models/PayrollUS/Employee/SalaryAndWage.php
+++ b/src/XeroPHP/Models/PayrollUS/Employee/SalaryAndWage.php
@@ -106,18 +106,19 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'SalaryAndWageID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'EarningsTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'SalaryWagesType' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'HourlyRate' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'AnnualSalary' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'StandardHoursPerWeek' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'EffectiveDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false)
+            'SalaryAndWageID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'EarningsTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'SalaryWagesType' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'HourlyRate' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'AnnualSalary' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'StandardHoursPerWeek' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'EffectiveDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/Employee/WorkLocation.php b/src/XeroPHP/Models/PayrollUS/Employee/WorkLocation.php
index d909e35a..2df8dded 100644
--- a/src/XeroPHP/Models/PayrollUS/Employee/WorkLocation.php
+++ b/src/XeroPHP/Models/PayrollUS/Employee/WorkLocation.php
@@ -76,13 +76,14 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'WorkLocationID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'IsPrimary' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false)
+            'WorkLocationID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'IsPrimary' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/PayItem.php b/src/XeroPHP/Models/PayrollUS/PayItem.php
index 13183bcf..b9f5e874 100644
--- a/src/XeroPHP/Models/PayrollUS/PayItem.php
+++ b/src/XeroPHP/Models/PayrollUS/PayItem.php
@@ -101,16 +101,17 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'EarningsTypes' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\PayItem\\EarningsType', true),
-            'BenefitTypes' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\PayItem\\BenefitType', true),
-            'DeductionTypes' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\PayItem\\DeductionType', true),
-            'ReimbursementTypes' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\PayItem\\ReimbursementType', true),
-            'TimeOffTypes' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\PayItem\\TimeOffType', true)
+            'EarningsTypes' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\PayItem\\EarningsType', true, false),
+            'BenefitTypes' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\PayItem\\BenefitType', true, false),
+            'DeductionTypes' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\PayItem\\DeductionType', true, false),
+            'ReimbursementTypes' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\PayItem\\ReimbursementType', true, false),
+            'TimeOffTypes' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\PayItem\\TimeOffType', true, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/PayItem/BenefitType.php b/src/XeroPHP/Models/PayrollUS/PayItem/BenefitType.php
index 97e66154..46e56f37 100644
--- a/src/XeroPHP/Models/PayrollUS/PayItem/BenefitType.php
+++ b/src/XeroPHP/Models/PayrollUS/PayItem/BenefitType.php
@@ -134,20 +134,21 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'BenefitType' => array (true, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\PayItem\\BenefitType', false),
-            'BenefitCategory' => array (true, self::PROPERTY_TYPE_ENUM, null, false),
-            'LiabilityAccountCode' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'ExpenseAccountCode' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'BenefitTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'StandardAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'CompanyMax' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Percentage' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ShowBalanceOnPaystub' => array (false, self::PROPERTY_TYPE_FLOAT, null, false)
+            'BenefitType' => array (true, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\PayItem\\BenefitType', false, false),
+            'BenefitCategory' => array (true, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'LiabilityAccountCode' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ExpenseAccountCode' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'BenefitTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'StandardAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'CompanyMax' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Percentage' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ShowBalanceOnPaystub' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/PayItem/DeductionType.php b/src/XeroPHP/Models/PayrollUS/PayItem/DeductionType.php
index a0bcea82..8c149ae7 100644
--- a/src/XeroPHP/Models/PayrollUS/PayItem/DeductionType.php
+++ b/src/XeroPHP/Models/PayrollUS/PayItem/DeductionType.php
@@ -137,18 +137,19 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'DeductionType' => array (true, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\PayItem\\DeductionType', false),
-            'DeductionCategory' => array (true, self::PROPERTY_TYPE_ENUM, null, false),
-            'CalculationType' => array (true, self::PROPERTY_TYPE_FLOAT, null, false),
-            'LiabilityAccountCode' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'DeductionTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'StandardAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'CompanyMax' => array (false, self::PROPERTY_TYPE_FLOAT, null, false)
+            'DeductionType' => array (true, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\PayItem\\DeductionType', false, false),
+            'DeductionCategory' => array (true, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'CalculationType' => array (true, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'LiabilityAccountCode' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'DeductionTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'StandardAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'CompanyMax' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/PayItem/EarningsType.php b/src/XeroPHP/Models/PayrollUS/PayItem/EarningsType.php
index f4efc489..358d69ed 100644
--- a/src/XeroPHP/Models/PayrollUS/PayItem/EarningsType.php
+++ b/src/XeroPHP/Models/PayrollUS/PayItem/EarningsType.php
@@ -153,22 +153,23 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'EarningsType' => array (true, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\PayItem\\EarningsType', false),
-            'DisplayName' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'ExpenseAccountCode' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'EarningsCategory' => array (true, self::PROPERTY_TYPE_ENUM, null, false),
-            'RateType' => array (true, self::PROPERTY_TYPE_ENUM, null, false),
-            'TypeOfUnits' => array (true, self::PROPERTY_TYPE_ENUM, null, false),
-            'EarningsRateID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Multiple' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'DoNotAccrueTimeOff' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'IsSupplemental' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false)
+            'EarningsType' => array (true, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\PayItem\\EarningsType', false, false),
+            'DisplayName' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ExpenseAccountCode' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'EarningsCategory' => array (true, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'RateType' => array (true, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'TypeOfUnits' => array (true, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'EarningsRateID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Multiple' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'DoNotAccrueTimeOff' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'IsSupplemental' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/PayItem/ReimbursementType.php b/src/XeroPHP/Models/PayrollUS/PayItem/ReimbursementType.php
index 40c45ffb..3078e1af 100644
--- a/src/XeroPHP/Models/PayrollUS/PayItem/ReimbursementType.php
+++ b/src/XeroPHP/Models/PayrollUS/PayItem/ReimbursementType.php
@@ -82,14 +82,15 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'ReimbursementType' => array (true, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\PayItem\\ReimbursementType', false),
-            'ExpenseOrLiabilityAccountCode' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'ReimbursementTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'ReimbursementType' => array (true, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\PayItem\\ReimbursementType', false, false),
+            'ExpenseOrLiabilityAccountCode' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ReimbursementTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/PayItem/TimeOffType.php b/src/XeroPHP/Models/PayrollUS/PayItem/TimeOffType.php
index 99817b42..b9b31707 100644
--- a/src/XeroPHP/Models/PayrollUS/PayItem/TimeOffType.php
+++ b/src/XeroPHP/Models/PayrollUS/PayItem/TimeOffType.php
@@ -105,17 +105,18 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'TimeOffType' => array (true, self::PROPERTY_TYPE_ENUM, null, false),
-            'TimeOffCategory' => array (true, self::PROPERTY_TYPE_ENUM, null, false),
-            'ExpenseAccountCode' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'LiabilityAccountCode' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'TimeOffTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ShowBalanceToEmployee' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'TimeOffType' => array (true, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'TimeOffCategory' => array (true, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'ExpenseAccountCode' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'LiabilityAccountCode' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'TimeOffTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ShowBalanceToEmployee' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/PayRun.php b/src/XeroPHP/Models/PayrollUS/PayRun.php
index caa3b41d..124b9a53 100644
--- a/src/XeroPHP/Models/PayrollUS/PayRun.php
+++ b/src/XeroPHP/Models/PayrollUS/PayRun.php
@@ -138,23 +138,24 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'PayScheduleID' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'PayRunPeriodEndDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'PayRunStatus' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'PayRunID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'PayRunPeriodStartDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'PaymentDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'Earnings' => array (false, self::PROPERTY_TYPE_STRING, null, true),
-            'Deductions' => array (false, self::PROPERTY_TYPE_STRING, null, true),
-            'Reimbursement' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'NetPay' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'UpdateDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'PayStubs' => array (false, self::PROPERTY_TYPE_STRING, null, true)
+            'PayScheduleID' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'PayRunPeriodEndDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'PayRunStatus' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'PayRunID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'PayRunPeriodStartDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'PaymentDate' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'Earnings' => array (false, self::PROPERTY_TYPE_STRING, null, true, false),
+            'Deductions' => array (false, self::PROPERTY_TYPE_STRING, null, true, false),
+            'Reimbursement' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'NetPay' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'UpdateDateUTC' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'PayStubs' => array (false, self::PROPERTY_TYPE_STRING, null, true, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/PaySchedule.php b/src/XeroPHP/Models/PayrollUS/PaySchedule.php
index 37c015d8..502013ac 100644
--- a/src/XeroPHP/Models/PayrollUS/PaySchedule.php
+++ b/src/XeroPHP/Models/PayrollUS/PaySchedule.php
@@ -96,16 +96,17 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'PayScheduleName' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'PaymentDate' => array (true, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'StartDate' => array (true, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'ScheduleType' => array (true, self::PROPERTY_TYPE_ENUM, null, false),
-            'PayScheduleId' => array (false, self::PROPERTY_TYPE_GUID, null, false)
+            'PayScheduleName' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'PaymentDate' => array (true, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'StartDate' => array (true, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'ScheduleType' => array (true, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'PayScheduleId' => array (false, self::PROPERTY_TYPE_GUID, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/Paystub.php b/src/XeroPHP/Models/PayrollUS/Paystub.php
index 0d584a49..14244e14 100644
--- a/src/XeroPHP/Models/PayrollUS/Paystub.php
+++ b/src/XeroPHP/Models/PayrollUS/Paystub.php
@@ -187,30 +187,31 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'EmployeeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'PaystubID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'PayRunID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'FirstName' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'LastName' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'LastEdited' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Earnings' => array (false, self::PROPERTY_TYPE_FLOAT, null, true),
-            'Deductions' => array (false, self::PROPERTY_TYPE_FLOAT, null, true),
-            'Tax' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'Reimbursements' => array (false, self::PROPERTY_TYPE_FLOAT, null, true),
-            'NetPay' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'EarningsLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\EarningsLine', true),
-            'LeaveEarningsLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\LeaveEarningsLine', true),
-            'TimesheetEarningsLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\TimesheetEarningsLine', true),
-            'DeductionLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\DeductionLine', true),
-            'ReimbursementLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\ReimbursementLine', true),
-            'BenefitLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\BenefitLine', true),
-            'TimeOffLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\TimeOffLine', true)
+            'EmployeeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'PaystubID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'PayRunID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'FirstName' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'LastName' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'LastEdited' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Earnings' => array (false, self::PROPERTY_TYPE_FLOAT, null, true, false),
+            'Deductions' => array (false, self::PROPERTY_TYPE_FLOAT, null, true, false),
+            'Tax' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'Reimbursements' => array (false, self::PROPERTY_TYPE_FLOAT, null, true, false),
+            'NetPay' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'UpdatedDateUTC' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'EarningsLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\EarningsLine', true, false),
+            'LeaveEarningsLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\LeaveEarningsLine', true, false),
+            'TimesheetEarningsLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\TimesheetEarningsLine', true, false),
+            'DeductionLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\DeductionLine', true, false),
+            'ReimbursementLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\ReimbursementLine', true, false),
+            'BenefitLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\BenefitLine', true, false),
+            'TimeOffLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Paystub\\TimeOffLine', true, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/Paystub/BenefitLine.php b/src/XeroPHP/Models/PayrollUS/Paystub/BenefitLine.php
index 3deca441..ed21ac75 100644
--- a/src/XeroPHP/Models/PayrollUS/Paystub/BenefitLine.php
+++ b/src/XeroPHP/Models/PayrollUS/Paystub/BenefitLine.php
@@ -76,13 +76,14 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'BenefitTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false)
+            'BenefitTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/Paystub/DeductionLine.php b/src/XeroPHP/Models/PayrollUS/Paystub/DeductionLine.php
index 71ba6677..f1c9d460 100644
--- a/src/XeroPHP/Models/PayrollUS/Paystub/DeductionLine.php
+++ b/src/XeroPHP/Models/PayrollUS/Paystub/DeductionLine.php
@@ -88,15 +88,16 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'DeductionTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'CalculationType' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'Percentage' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false)
+            'DeductionTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'CalculationType' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'Percentage' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/Paystub/EarningsLine.php b/src/XeroPHP/Models/PayrollUS/Paystub/EarningsLine.php
index be53b1bc..aa97b386 100644
--- a/src/XeroPHP/Models/PayrollUS/Paystub/EarningsLine.php
+++ b/src/XeroPHP/Models/PayrollUS/Paystub/EarningsLine.php
@@ -82,14 +82,15 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'EarningsTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'RatePerUnit' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'NumberOfUnits' => array (false, self::PROPERTY_TYPE_FLOAT, null, true)
+            'EarningsTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'RatePerUnit' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'NumberOfUnits' => array (false, self::PROPERTY_TYPE_FLOAT, null, true, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/Paystub/LeaveEarningsLine.php b/src/XeroPHP/Models/PayrollUS/Paystub/LeaveEarningsLine.php
index 866408ef..9f56b2e6 100644
--- a/src/XeroPHP/Models/PayrollUS/Paystub/LeaveEarningsLine.php
+++ b/src/XeroPHP/Models/PayrollUS/Paystub/LeaveEarningsLine.php
@@ -82,14 +82,15 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'EarningsTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'RatePerUnit' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'NumberOfUnits' => array (false, self::PROPERTY_TYPE_FLOAT, null, true)
+            'EarningsTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'RatePerUnit' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'NumberOfUnits' => array (false, self::PROPERTY_TYPE_FLOAT, null, true, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/Paystub/ReimbursementLine.php b/src/XeroPHP/Models/PayrollUS/Paystub/ReimbursementLine.php
index 3763868e..1bfde0ca 100644
--- a/src/XeroPHP/Models/PayrollUS/Paystub/ReimbursementLine.php
+++ b/src/XeroPHP/Models/PayrollUS/Paystub/ReimbursementLine.php
@@ -88,15 +88,16 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'ReimbursementTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Description' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'ExpenseAccount' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false)
+            'ReimbursementTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Description' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'ExpenseAccount' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Amount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/Paystub/TimeOffLine.php b/src/XeroPHP/Models/PayrollUS/Paystub/TimeOffLine.php
index a11eae1f..c76f539d 100644
--- a/src/XeroPHP/Models/PayrollUS/Paystub/TimeOffLine.php
+++ b/src/XeroPHP/Models/PayrollUS/Paystub/TimeOffLine.php
@@ -82,14 +82,15 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'TimeOffTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Hours' => array (false, self::PROPERTY_TYPE_STRING, null, true),
-            'Balance' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'TimeOffTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Hours' => array (false, self::PROPERTY_TYPE_STRING, null, true, false),
+            'Balance' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/Paystub/TimesheetEarningsLine.php b/src/XeroPHP/Models/PayrollUS/Paystub/TimesheetEarningsLine.php
index b822bd6b..adcdb284 100644
--- a/src/XeroPHP/Models/PayrollUS/Paystub/TimesheetEarningsLine.php
+++ b/src/XeroPHP/Models/PayrollUS/Paystub/TimesheetEarningsLine.php
@@ -82,14 +82,15 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'EarningsTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'RatePerUnit' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
-            'NumberOfUnits' => array (false, self::PROPERTY_TYPE_FLOAT, null, true)
+            'EarningsTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'RatePerUnit' => array (false, self::PROPERTY_TYPE_FLOAT, null, false, false),
+            'NumberOfUnits' => array (false, self::PROPERTY_TYPE_FLOAT, null, true, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/Setting.php b/src/XeroPHP/Models/PayrollUS/Setting.php
index fdf4bb7a..7304b6d9 100644
--- a/src/XeroPHP/Models/PayrollUS/Setting.php
+++ b/src/XeroPHP/Models/PayrollUS/Setting.php
@@ -79,13 +79,14 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'Accounts' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Setting\\Account', true),
-            'TrackingCategories' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Setting\\TrackingCategory', true)
+            'Accounts' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Setting\\Account', true, false),
+            'TrackingCategories' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Setting\\TrackingCategory', true, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/Setting/Account.php b/src/XeroPHP/Models/PayrollUS/Setting/Account.php
index 6147efb1..62a31a8d 100644
--- a/src/XeroPHP/Models/PayrollUS/Setting/Account.php
+++ b/src/XeroPHP/Models/PayrollUS/Setting/Account.php
@@ -88,15 +88,16 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'AccountID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Type' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Code' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Name' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'AccountID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Type' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Code' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Name' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/Setting/TrackingCategory.php b/src/XeroPHP/Models/PayrollUS/Setting/TrackingCategory.php
index 165ef46a..dc436457 100644
--- a/src/XeroPHP/Models/PayrollUS/Setting/TrackingCategory.php
+++ b/src/XeroPHP/Models/PayrollUS/Setting/TrackingCategory.php
@@ -76,13 +76,14 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'TrackingCategoryID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'TrackingCategoryName' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'TrackingCategoryID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'TrackingCategoryName' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/Timesheet.php b/src/XeroPHP/Models/PayrollUS/Timesheet.php
index 2e22af88..3e524bb7 100644
--- a/src/XeroPHP/Models/PayrollUS/Timesheet.php
+++ b/src/XeroPHP/Models/PayrollUS/Timesheet.php
@@ -113,18 +113,19 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'EmployeeID' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'StartDate' => array (true, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'EndDate' => array (true, self::PROPERTY_TYPE_DATE, '\\DateTime', false),
-            'TimesheetLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Timesheet\\TimesheetLine', true),
-            'Status' => array (false, self::PROPERTY_TYPE_ENUM, null, false),
-            'TimesheetID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Hours' => array (false, self::PROPERTY_TYPE_STRING, null, true)
+            'EmployeeID' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'StartDate' => array (true, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'EndDate' => array (true, self::PROPERTY_TYPE_DATE, '\\DateTime', false, false),
+            'TimesheetLines' => array (false, self::PROPERTY_TYPE_OBJECT, 'PayrollUS\\Timesheet\\TimesheetLine', true, false),
+            'Status' => array (false, self::PROPERTY_TYPE_ENUM, null, false, false),
+            'TimesheetID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Hours' => array (false, self::PROPERTY_TYPE_STRING, null, true, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/Timesheet/TimesheetLine.php b/src/XeroPHP/Models/PayrollUS/Timesheet/TimesheetLine.php
index b2e7d763..8b2f15b5 100644
--- a/src/XeroPHP/Models/PayrollUS/Timesheet/TimesheetLine.php
+++ b/src/XeroPHP/Models/PayrollUS/Timesheet/TimesheetLine.php
@@ -83,14 +83,15 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'EarningsTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'TrackingItemID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'NumberOfUnits' => array (false, self::PROPERTY_TYPE_STRING, null, true)
+            'EarningsTypeID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'TrackingItemID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'NumberOfUnits' => array (false, self::PROPERTY_TYPE_STRING, null, true, false)
         );
     }
 
diff --git a/src/XeroPHP/Models/PayrollUS/WorkLocation.php b/src/XeroPHP/Models/PayrollUS/WorkLocation.php
index 15b0a037..431748c8 100644
--- a/src/XeroPHP/Models/PayrollUS/WorkLocation.php
+++ b/src/XeroPHP/Models/PayrollUS/WorkLocation.php
@@ -114,19 +114,20 @@ public static function getSupportedMethods() {
      *  [1] - Type
      *  [2] - PHP type
      *  [3] - Is an Array
+     *  [4] - Saves directly
      *
      * @return array
      */
     public static function getProperties() {
         return array(
-            'StreetAddress' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'City' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'State' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'Latitude' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'Longitude' => array (true, self::PROPERTY_TYPE_STRING, null, false),
-            'WorkLocationID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'SuitOrAptOrUnit' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'IsPrimary' => array (false, self::PROPERTY_TYPE_STRING, null, false)
+            'StreetAddress' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'City' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'State' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Latitude' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'Longitude' => array (true, self::PROPERTY_TYPE_STRING, null, false, false),
+            'WorkLocationID' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'SuitOrAptOrUnit' => array (false, self::PROPERTY_TYPE_STRING, null, false, false),
+            'IsPrimary' => array (false, self::PROPERTY_TYPE_STRING, null, false, false)
         );
     }