// doLeaveRoomCB
// calls the leave room callback to the appropriate client
public void doLeaveRoomCB(String userName, String roomName) throws RemoteException {
clientCallbackObj.leaveRoomCB(userName, roomName);
}
// doLeaveRoomCB
// calls the leave room callback to the appropriate client
public void doLeaveRoomCB(String userName, String roomName) throws RemoteException {
clientCallbackObj.leaveRoomCB(userName, roomName);
}