@Override
  public void conflateEvent(Conflatable conflatableObject, int bucketId, Long tailKey) {
    ((ParallelGatewaySenderQueue) queue).conflateEvent(conflatableObject, bucketId, tailKey);
  }
use in concurrent scenario where queue is to be shared among all the processors.
geode-core/src/main/java/org/apache/geode/internal/cache/wan/parallel/ParallelGatewaySenderEventProcessor.java