module FileSelection:sig..end
val cast : 'a Gobject.obj -> Gtk.file_selection Gtk.objmodule P:sig..end
val make_params : cont:(([> `fileselection ] as 'a) Gobject.param list -> 'b) ->
'a Gobject.param list ->
?filename:string -> ?select_multiple:bool -> ?show_fileops:bool -> 'b