# Module GtkBin.Viewport

    module Viewport: GtkBinProps.Viewport

    val cast : 'a Gobject.obj -> Gtk.viewport Gtk.obj

    module P: sig .. end

    module S: sig .. end

    val create : Gtk.viewport Gobject.param list -> Gtk.viewport Gtk.obj

    val make_params : cont:(([> `viewport ] as 'a) Gobject.param list -> 'b) ->
           'a Gobject.param list ->
           ?hadjustment:Gtk.adjustment Gtk.obj ->
           ?vadjustment:Gtk.adjustment Gtk.obj ->
           ?shadow_type:GtkEnums.shadow_type -> 'b