Gtk.ToolItem.prototype.set_proxy_menu_item

function set_proxy_menu_item(menu_item_id:String, menu_item:Gtk.Widget):void {
    // Gjs wrapper for gtk_tool_item_set_proxy_menu_item()
}

Sets the Gtk.MenuItem used in the toolbar overflow menu. The menu_item_id is used to identify the caller of this function and should also be used with Gtk.ToolItem.prototype.get_proxy_menu_item.

Since 2.4