create_menu_bar (MainWindow)

          # File lib/json/editor.rb, line 1090
    1090:       def create_menu_bar
    1091:         menu_bar = MenuBar.new
    1092:         @file_menu = FileMenu.new(@treeview)
    1093:         menu_bar.append @file_menu.create
    1094:         @edit_menu = EditMenu.new(@treeview)
    1095:         menu_bar.append @edit_menu.create
    1096:         @options_menu = OptionsMenu.new(@treeview)
    1097:         menu_bar.append @options_menu.create
    1098:         menu_bar
    1099:       end