The org.zkoss.zk.ui.util.DesktopInit interface
A listener could implement DesktopInit to initialize a new desktop.
When ZK Loader created a new desktop, it invokes the
init method of this interface such that developers could plug the application-specific codes to initialize a desktop.
A developer can prevent a desktop from being created by throwing an exception in the
Instantiation: An independent instance of the given class is instantiated each time before the method is invoked. It means it is thread safe, and all information stored in non-static members will be lost after called.