Windows previews or overview for all instances of app icon in plank

Will be great if you implement to plank an app windows overview, Like when you double click on app of ubuntu unity.
The idea is when double left click in a icon show the windows overview of all instances of selected icon app.
If you presss right click show the classic plank menu of items as we knows.
I am not developer but think that may be we need something like gala workspace overview but applied to plank and icons instead workspaces . Thank you in advance.