# Class virtual OgtkTreeProps.tree_sortable_sigs

    class virtual tree_sortable_sigs : object .. end

    method private virtual connect : 'b. ([> `treesortable ], 'b) GtkSignal.t -> callback:'b -> GtkSignal.id

    method private virtual notify : 'b.
             ([> `treesortable ] as 'a, 'b) Gobject.property ->
             callback:('b -> unit) -> GtkSignal.id

    method sort_column_changed : callback:(unit -> unit) -> GtkSignal.id