@Override
                      public boolean apply(Request<?> candidate) {
                        return candidate != null
                            && request.getSequence() == candidate.getSequence();
                      }
@param requestQueue The Volley {@link RequestQueue} to use
imagepipeline-backends/imagepipeline-volley/src/main/java/com/facebook/imagepipeline/backends/volley/VolleyNetworkFetcher.java