code: @Override
      public ListNodesResult listNodes(ListNodesRequest request) {
          request = beforeClientExecution(request);
          return executeListNodes(request);
      }
docs: <p>
  Returns a list of the broker nodes in the cluster.
  </p>
  
  @param listNodesRequest
  @return Result of the ListNodes operation returned by the service.
  @throws NotFoundException
  The resource could not be found due to incorrect input. Correct your request and then retry it.
  @throws BadRequestException
  Bad request due to incorrect input. Correct your request and then retry it.
  @throws InternalServerErrorException
  There was an unexpected internal server error. Retrying your request might resolve the issue.
  @throws ForbiddenException
  Access forbidden. Check your credentials and then retry your request.
  @sample AWSKafka.ListNodes
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/kafka-2018-11-14/ListNodes" target="_top">AWS API
  Documentation</a>