@Nullable
  public ImageRequest getLowResImageRequest() {
    return mLowResImageRequest;
  }
Data class to enable using functionality of {@link
com.facebook.datasource.IncreasingQualityDataSourceSupplier} and/or {@link
com.facebook.datasource.FirstAvailableDataSourceSupplier} with Vito
imagepipeline/src/main/java/com/facebook/imagepipeline/multiuri/MultiUri.java