# Class virtual OgtkFileProps.file_chooser_button_notify

    class virtual file_chooser_button_notify : [> `filechooserbutton ] Gobject.obj -> object .. end

    val obj : ([> `filechooserbutton ] as 'a) Gobject.obj

    method private notify : 'b. ('a, 'b) Gobject.property -> callback:('b -> unit) -> GtkSignal.id

    method title : callback:(string -> unit) -> GtkSignal.id

    method width_chars : callback:(int -> unit) -> GtkSignal.id