public synchronized USER remove(final ID sessionId)
	{
		final USER user = getUser(sessionId);
		if (user != null)
		{
			usersOnline.remove(user);
		}
		sessionIdToUser.remove(sessionId);
		return user;
	}
public synchronized USER remove ( final ID sessionId ) { final USER user = getUser ( sessionId ) ; if ( user != null ) { usersOnline . remove ( user ) ; } sessionIdToUser . remove ( sessionId ) ; return user ; }
Removes the user from the map with the session id.

@param sessionId
the session id
@return the user