@Override
    public synchronized void update() {
      updateInternal();
    }
PostprocessorConsumer wrapper that allows repeated postprocessing.

<p>Reference to the last result received is cloned and kept until the request is cancelled. In
order to allow multiple postprocessing, results are always propagated as non-final. When {@link
#update()} is called, a new postprocessing of the last received result is requested.

<p>Intermediate results are ignored.
imagepipeline/src/main/java/com/facebook/imagepipeline/producers/PostprocessorProducer.java