/**
  * Sets the headers. This will be returned by {@link
  * com.linkedin.restli.client.Response#getHeaders()}
  *
  * @param headers the headers we want to set
  * @return
  */
 @Override
 public MockSuccessfulResponseFutureBuilder<T> setHeaders(Map<String, String> headers) {
   super.setHeaders(headers);
   return this;
 }