how to find unused vaadin add-ons with ECLIPSE


I am using eclipse to develop my application , and I have downloaded a lot of addons from the directory to give them a try , but now a lot of these addons are unused in my project

How can I find which addons are not used in my application/not mentioned in my code?

maybe its not so vaadin specific , but it would be a life-saver for me :slight_smile:

And by the way is there a good book or tutorial on ECLIPSE IDE , and WTP and/or javaEE (web) development with ECLIPSE to be more specific ?