ZK Pass argument from ZUL page to ViewModel Class

Today i was looking on the ZK Forum and i saw someone have issue to pass argument from ZUL page to a ViewModel method here i am giving a example for that ,Let us suppose you want to pass instance from ZUL to a method you can code like this..

And the action method in View Model class
For more information you can check this question Pass argument in ZK Zul page to ViewModel class