@Override
  public String toString() {
    StringBuilder buff = new StringBuilder();
    buff.append(getClass().getName());
    buff.append("(processorId=");
    buff.append(processorId);
    buff.append(" from ");
    buff.append(getSender());
    ReplyException ex = getException();
    if (ex != null) {
      buff.append(" with exception ");
      buff.append(ex);
    }
    buff.append(";msgNum ");
    buff.append(msgNum);
    buff.append(";lastMsg=");
    buff.append(lastMsg);
    buff.append(")");
    return buff.toString();
  }
@param msgNum message number in this series (0-based)
@param lastMsg if this is the last message in this series
geode-core/src/main/java/org/apache/geode/internal/cache/FunctionStreamingReplyMessage.java