@Override
  public String toString() {
    String cname = getClass().getName().substring(getClass().getPackage().getName().length() + 1);
    return cname + "(op=" + operation + ", tag=" + operationTag + "event=" + event
        + ")";
  }
obtain locks on version generation in other members have them do a state-flush back to this
member
geode-core/src/main/java/org/apache/geode/internal/cache/DistributedClearOperation.java