return connector.addInvocationHandler(s, h);
subsystemToHandler.put(subsystem, h); return connector.addInvocationHandler(subsystem, h);
   public ServerInvocationHandler addInvocationHandler(String s, ServerInvocationHandler h)      throws Exception   {      if (connector != null)      {         return connector.addInvocationHandler(s, h);      }      return null;   }