Thank you, Alex T⚜️ !
I cannot find anything like BxTemplFunction.php in the sample template module. Where can I get an example of this class?
Also, I would like to clarify the use of injections: say, we have before_main_logo injection (if I'm not mistaken - this is default for UNA templates), which doesn't exist. If I create an injection with such a name in the database, it will be shown on the website.
However, I don't see it under Designer->Injections, meaning that user cannot modify an injection.
How can I display injections under Designer->Injections?