As an example of how this ( IDebugSettings#setOutputComponentPath(true) ) functionality can be used, a small HOWTO for the Selenium IDE.
Create a folder "wicketPathLocatorBuilder" with the file "user-extension.js.wicketPathLocatorBuilder". Paste the following snipped in this file.
Install the Selenium IDE plugin for Firefox from http://seleniumhq.org/download/ .
Open the Selenium IDE, go to menu Options -> Options. In the Selenium Core extensions input field, paste the path to the earlier created folder "wicketPathLocatorBuilder". Restart firefox.
You can now record tests by clicking and/or right-clicking to insert additional commands. By default, the wicketpath attribute is used to generate an element locator.