docs: private void writeToDiskCache(
        final CacheKey key,
        final EncodedImage encodedImage) {
      FLog.v(TAG, "About to write to disk-cache for key %s", key.getUriString());
      try {
        mFileCache.insert(
            key, new WriterCallback() {
              @Override
              public void write(OutputStream os) throws IOException {
                mPooledByteStreams.copy(encodedImage.getInputStream(), os);
              }
            }
        );
        FLog.v(TAG, "Successful disk-cache write for key %s", key.getUriString());
      } catch (IOException ioe) {
        // Log failure
        // TODO: 3697790
        FLog.w(TAG, ioe, "Failed to write to disk-cache for key %s", key.getUriString());
      }
    }