@Override
  public String toString() {
    String cname = getShortClassName();
    return cname + "regionToDispatchedKeysMap=" + regionToDispatchedKeysMap
        + " sender=" + getSender();
  }
Removes a batch of events from the remote secondary queues

@since GemFire 8.0
geode-core/src/main/java/org/apache/geode/internal/cache/wan/parallel/ParallelQueueRemovalMessage.java