code: public void evictFromDiskCache(final ImageRequest imageRequest) {
      CacheKey cacheKey = mCacheKeyFactory.getEncodedCacheKey(imageRequest, null);
      mMainBufferedDiskCache.remove(cacheKey);
      mSmallImageBufferedDiskCache.remove(cacheKey);
    }
docs: Removes all images with the specified {@link Uri} from disk cache.
  
  @param imageRequest The imageRequest for the image to evict from disk cache