mypy complains about Gtk.Template Call typing

[theCapypara]

In #187 Gtk.Template.Call was changed to be "generic". However this change breaks existing code with the mypy type checker for me:

@Gtk.Template
class Foo:
    bar = cast(Adw.ActionRow, Gtk.Template.Child())

This fails with:

error: Attribute function "Child" with type "Callable[[], Any]" does not accept self argument  [misc]

I think this isn't actually because of the Cast, but rather because the definition is wrong?

Shouldn't it be:

class Template:
    ...

    @classmethod
    def Child(cls) -> Any: ...

Note the cls. This fixes the issue for me.

mypy version: 1.13.0