package Gtkada.Handlers is
package Widget_Callback is new Gtk.Handlers.Callback (Gtk.Widget.Gtk_Widget_Record);
package Return_Callback is new Gtk.Handlers.Return_Callback (Gtk.Widget.Gtk_Widget_Record, Boolean);
package Object_Callback is new Gtk.Handlers.Callback (Glib.Object.GObject_Record);
package Object_Return_Callback is new Gtk.Handlers.Return_Callback (Glib.Object.GObject_Record, Boolean);