close_position throws an error when trying to use it

[RedsGT]

close_position throws an error when trying to use it in configuration.yml.

When checking the config prior to yaml reload: "Invalid config for 'mysmartblinds' from integration 'cover' at configuration.yaml, line 51: 'close_position' is an invalid option for 'cover.mysmartblinds', check: close_position"

If I remove it everything works correctly. (Minus being able to set the close position)