I am using Eclipse (for RCP) to create a XML file, I notice that there are Design and Source tab for the xml file, please see the photo below for more detail:http://img6.ph.126.net/_XEDpd6P2MvYWt4mkYH7rg==/2686115702767268286.jpgI have two questions:1. How can I view the source code of the UI for Design tab? (Which jar does it belong?)2. How does the Design tab tie to the Source tab? How can they synchronize?