code: protected void send(byte[] data, ResponseListener listener) {
          String contentTypeHeader = headers.get(CONTENT_TYPE);
          final String contentType = contentTypeHeader != null ? contentTypeHeader : BINARY_CONTENT_TYPE;
  
          RequestBody body = RequestBody.create(MediaType.parse(contentType), data);
  
          sendRequest(null, listener, body);
      }
docs: Send this resource request asynchronously, with the given byte array as the request body.
  If the Content-Type header was not previously set, this method will set it to "application/octet-stream".
  
  @param data      The byte array to put in the request body
  @param listener  The listener whose onSuccess or onFailure methods will be called when this request finishes