@Override
          public void onClick(View v) {
            for (Uri uri : mUris) {
              Fresco.getImagePipeline().evictFromCache(uri);
            }
          }
Fragment that illustrates how to prefetch images to disk cache so that they load faster when
finally displayed.
samples/showcase/src/main/java/com/facebook/fresco/samples/showcase/imagepipeline/ImagePipelinePrefetchFragment.java