docs: public synchronized void put(final CacheKey key, final EncodedImage encodedImage) {
      Preconditions.checkNotNull(key);
      Preconditions.checkArgument(EncodedImage.isValid(encodedImage));
  
      // we're making a 'copy' of this reference - so duplicate it
      final EncodedImage oldEntry = mMap.put(key, EncodedImage.cloneOrNull(encodedImage));
      EncodedImage.closeSafely(oldEntry);
      logStats();
    }