Priyanka Dhingra:
If what I am thinking and asking is not apt and is not the right direction...Do comment
The real question is why would you want to do this?
Instantiable controls whether you can have only one instance of a portlet on a given page or whether multiple instances per page are allowed.
For example, web content can be on a page multiple times, and that makes sense. Each one can contain different content, so they are each separate instances.
Mail on the other hand only makes sense to have a single instance on a page (yes, users can have multiple mail accounts, but all of the accounts listed in separate mail portlets on a single page would be pretty confusing).
For all of the Liferay portlets, I think they've done a pretty good job determining which ones can be multiples and which ones should allow only a single instance.
So it gets back to the question, why would you want to do this?
