CustomFilter

Description:

[ CCode ( has_construct_function = false ) ]
public CustomFilter (owned CustomFilterFunc? match_func)

Creates a new filter using the given function to filter items.

If match_func is `NULL`, the filter matches all items.

If the filter func changes its filtering behavior, [method@Gtk.Filter.changed] needs to be called.

match_func	function to filter items
user_data	user data to pass to `match_func`
user_destroy	destroy notify for `user_data`

a new `GtkCustomFilter`