`object
method actions_changed : callback:(unit -> unit) -> GtkSignal.id
method add_widget : callback:(GObj.widget -> unit) -> GtkSignal.id
method private virtual connect :
'b.
([> `uimanager ] as 'a, 'b) GtkSignal.t -> callback:'b -> GtkSignal.id
method private virtual notify :
'b. ('a, 'b) Gobject.property -> callback:('b -> unit) -> GtkSignal.id
method notify_add_tearoffs : callback:(bool -> unit) -> GtkSignal.id
method notify_ui : callback:(string -> unit) -> GtkSignal.id
end`