code: public HttpResponse postQueueMessage(String queueName, String jsonPayload, Map<String, String> headers)
              throws RestClientException {
          return postMessage(Type.QUEUE, queueName, jsonPayload, headers);
      }
docs: Sends a message to the REST endpoint in order to put a message on the given queue.
  
  @param queueName name of the queue
  @param jsonPayload the actual message (as a JSON string) to put on the bus
  @param headers any headers to send with the message (can be null or empty)
  @return the response
  @throws RestClientException if the response was not a 200 status code