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