Sets our main struct and passes it to the parent class.
Creates a new empty "every" filter.
Get the main Gtk struct
the main Gtk struct as a void*
the main Gtk struct
the main Gtk struct
Get the main Gtk struct
the main Gtk struct as a void*
Adds a @filter to @self to use for matching.
Removes the filter at the given @position from the list of filters used by @self.
GtkEveryFilter matches an item when each of its filters matches.
To add filters to a GtkEveryFilter, use [method@Gtk.MultiFilter.append].