Never forget about developers; otherwise, they will get offended, and the whole IT world will collapse, so this is a standard column for them. This time briefly.
Finalization of additional fields list fetching
Improved getting the data of additional fields for the "Nested list" type. As a response, an array is returned, which contains all the actual id of the parent values (i.e., the values which, if selected, will make the current value of the current field available).
The parent_options_id parameter is the main one in this question.
New parameters in the ticket method
We started to give the method https://api.usedesk.ru/ticket addresses, which are in copies and hidden copies. Now you will know for sure if someone else should be added to the recipients of the mail.
Fixed extra fields to be filled in when using the template.
Now the additional fields will be filled in at the moment of template application, but not after it is sent to the client.