Introduce getEntity method in entity builders

[AndreasLrx]

Description

Everything is in the title.

Close : #152

What type of PR is this? (check all applicable)

• Refactor
• Feature
• Bug Fix
• Optimization
• Documentation Update

Added/updated tests?

• New tests written
• Existing tests updated
• Tests are not required because this is a simple getter and I don't want to make them now
• I need help with writing tests

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.21%. Comparing base (67f3801) to head (d9a8a23).

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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #153   +/-   ##
=======================================
  Coverage   83.21%   83.21%           
=======================================
  Files          63       63           
  Lines        1090     1090           
  Branches      345      345           
=======================================
  Hits          907      907           
  Misses        127      127           
  Partials       56       56           

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