Walks the packages of the module and indexes them, stores them in a collection, so I can find a class or package quickly. Like I can ask what the root client package is quickly. Both Eclipse and IDEA searching was a bit tough at the time of development so it was easier to just do it this way. I might be able to dump it at some point with IDEA, but I want to be sure I have the real close copy to Eclipse so I don't have to reinvent the wheel yet. :)