From ###@###.###:
"The RMIJRMPServerImpl class contains private export and unexport
methods which will use an RMIExporter for export/unexport if such
an object exists in the env, otherwise it explicitly uses UnicastRemoteObject
to export/unexport. The export() method is called to export the client and server,
but the unexport method is never called (dead code). Instead, the
closeClient/closeServer methods always call UnicastRemoteObject.unexportObject."

Note that this interface is not intended for use outside the J2SE code itself.