Adds filter to the list of #GtkRecentFilter objects held by chooser.
If no previous filter objects were defined, this function will call gtk.recent_chooser.RecentChooser.setFilter.
a #GtkRecentFilter
Adds filter to the list of #GtkRecentFilter objects held by chooser.
If no previous filter objects were defined, this function will call gtk.recent_chooser.RecentChooser.setFilter.