How to create Action for Diagram Shortcut Menu?

Hello everyone,

Recently  I am working with Cameo Java API and I was not able to create a action in Diagram Shortcut menu which is required for my work 

Can any body help me with that I will be sharing my code for creation of the plugin for Diagram Shortcut menu action here please review it any provide me the feedback and corrections that are required by me

please let me about it  thank you