@Override
  public Map<String, String> getExtraMap(VolleyNetworkFetchState fetchState, int byteSize) {
    Map<String, String> extraMap = new HashMap<>(4);
    extraMap.put(QUEUE_TIME, Long.toString(fetchState.responseTime - fetchState.submitTime));
    extraMap.put(FETCH_TIME, Long.toString(fetchState.fetchCompleteTime - fetchState.responseTime));
    extraMap.put(TOTAL_TIME, Long.toString(fetchState.fetchCompleteTime - fetchState.submitTime));
    extraMap.put(IMAGE_SIZE, Integer.toString(byteSize));
    return extraMap;
  }
@param requestQueue The Volley {@link RequestQueue} to use
imagepipeline-backends/imagepipeline-volley/src/main/java/com/facebook/imagepipeline/backends/volley/VolleyNetworkFetcher.java