code: private synchronized Producer<CloseableReference<CloseableImage>>
    getQualifiedResourceFetchSequence() {
      if (mQualifiedResourceFetchSequence == null) {
        QualifiedResourceFetchProducer qualifiedResourceFetchProducer =
            mProducerFactory.newQualifiedResourceFetchProducer();
        mQualifiedResourceFetchSequence =
            newBitmapCacheGetToLocalTransformSequence(qualifiedResourceFetchProducer);
      }
      return mQualifiedResourceFetchSequence;
    }
docs: bitmap cache get ->
  background thread hand-off -> multiplex -> bitmap cache -> decode ->
  branch on separate images
  -> exif resize and rotate -> exif thumbnail creation
  -> local image resize and rotate -> add meta data producer -> multiplex -> encoded cache ->
  (webp transcode) -> qualified resource fetch.