Fetch an object build from the template XML for @widget_type in
this @widget instance.
This will only report children which were previously declared
with [method@Gtk.WidgetClass.bind_template_child_full] or one of its
variants.
This function is only meant to be called for code which is private
to the @widget_type which declared the child and is meant for language
bindings which cannot easily make use of the GObject structure offsets.
Fetch an object build from the template XML for @widget_type in this @widget instance.
This will only report children which were previously declared with [method@Gtk.WidgetClass.bind_template_child_full] or one of its variants.
This function is only meant to be called for code which is private to the @widget_type which declared the child and is meant for language bindings which cannot easily make use of the GObject structure offsets.