Safari Extension : How to add menu and sub menu on bars?

Here I am working 开发者_Go百科with safari extension development. I have successfully get developer certificate on safari browser.

Here I am able to create menu and sub menu on toolbar item but as per my project requirement I have to include menu and menu items in bar.

Please suggest me way to done this thing.

Advance thanks...

A quick Googling exercise provided me with following two descriptive articles.

1. https://developer.apple.com/library/archive/documentation/Tools/Conceptual/SafariExtensionGuide/AddingContextualMenuItems/AddingContextualMenuItems.html

2. https://code.tutsplus.com/tutorials/how-to-create-a-safari-extension-from-scratch--net-15050