I'm trying to display the datasource into the administration.
Use the demo:

• Open the administration
• Open the datasource explorer tool
• Open the internal base, you can see Users table
• Open the derby base, you can see Users table
• But it is no more in the internal base

Also :

• Open one of these tables to view the content
• Open the other one without closing the first one
• Same tool is used with data of the first opened table