[news.eclipse.tools.jdt] exploring the jdt

["Mario Viertel" <spam@xxxxxxxxxxxxxxxx>]

Hi,

I want to explore the jdt.

In the project properties: Java Build Path | Libraries there is a button 
'Add Class Folder ...'. I want to find out which plugin performes the action 
for this button and what it does. That's why I've created a workspace and 
have imported all plugins as binary projects. Now I've performed a full text 
search in my workspace for the String "Add Class Folder". I've expected that 
any property file contains this String. But my search found nothing.

Do I have an error in reasoning? Which plugin performes the action for this 
button?

TIA
Mario