code: @Override
      public UpdateListenerResult updateListener(UpdateListenerRequest request) {
          request = beforeClientExecution(request);
          return executeUpdateListener(request);
      }
docs: <p>
  Update a listener.
  </p>
  
  @param updateListenerRequest
  @return Result of the UpdateListener operation returned by the service.
  @throws InvalidArgumentException
  An argument that you specified is invalid.
  @throws InvalidPortRangeException
  The port numbers that you specified are not valid numbers or are not unique for this accelerator.
  @throws ListenerNotFoundException
  The listener that you specified doesn't exist.
  @throws InternalServiceErrorException
  There was an internal error for AWS Global Accelerator.
  @throws LimitExceededException
  Processing your request would cause you to exceed an AWS Global Accelerator limit.
  @sample AWSGlobalAccelerator.UpdateListener
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/globalaccelerator-2018-08-08/UpdateListener"
  target="_top">AWS API Documentation</a>