code: protected Response getWithAccepts(MultivaluedMap<String, String> queryParams, URL url, String accepts) {
          return (invocation(url, queryParams, accepts).get());
      }
docs: Perform an HTTP GET call with the specified query parameters and URL, returning
  a ClientResponse instance with the data returned from the endpoint.
  
  @param queryParams multivalue map of request parameters
  @param url the fully formed path to the GitLab API endpoint
  @param accepts if non-empty will set the Accepts header to this value
  @return a ClientResponse instance with the data returned from the endpoint