public static void callOnIsIntermediateResultExpectedChanged(
      @Nullable List<ProducerContextCallbacks> callbacks) {
    if (callbacks == null) {
      return;
    }
    for (ProducerContextCallbacks callback : callbacks) {
      callback.onIsIntermediateResultExpectedChanged();
    }
  }
Calls {@code onIsIntermediateResultExpected} on each element of the list. Does nothing if list
== null
imagepipeline/src/main/java/com/facebook/imagepipeline/producers/BaseProducerContext.java