`object
method add : callback:(GObj.widget -> unit) -> GtkSignal.id
method private virtual connect :
'b.
([> `container ] 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_border_width : callback:(int -> unit) -> GtkSignal.id
method notify_resize_mode :
callback:(GtkEnums.resize_mode -> unit) -> GtkSignal.id
method remove : callback:(GObj.widget -> unit) -> GtkSignal.id
end`