@Override
  public String toString() {
    String cname = getShortClassName();
    final StringBuilder sb = new StringBuilder(cname);
    sb.append("reason=").append(reason);
    sb.append(" regionToDispatchedKeysMap=").append(regionToDuplicateEventsMap);
    sb.append(" sender=").append(getSender());
    return sb.toString();
  }
Sets events in the remote secondary queues to possible duplicate

@since Geode 1.15
geode-core/src/main/java/org/apache/geode/internal/cache/wan/parallel/ParallelQueueSetPossibleDuplicateMessage.java