`([> Gtk.expander ] as 'a) Gtk.obj ->
object ('b)
val obj : 'a Gtk.obj
method activate : callback:(unit -> unit) -> GtkSignal.id
method add : callback:(GObj.widget -> unit) -> GtkSignal.id
method after : 'b
method destroy : callback:(unit -> unit) -> GtkSignal.id
method notify_border_width : callback:(int -> unit) -> GtkSignal.id
method notify_expanded : callback:(bool -> unit) -> GtkSignal.id
method notify_label : callback:(string -> unit) -> GtkSignal.id
method notify_label_widget : callback:(GObj.widget -> unit) -> GtkSignal.id
method notify_resize_mode :
callback:(GtkEnums.resize_mode -> unit) -> GtkSignal.id
method notify_spacing : callback:(int -> unit) -> GtkSignal.id
method notify_use_underline : callback:(bool -> unit) -> GtkSignal.id
method remove : callback:(GObj.widget -> unit) -> GtkSignal.id
end`