protected void appendFields(StringBuilder buff) {
    buff.append("; sender=").append(getSender()).append("; recipients=[");
    List<InternalDistributedMember> recipients = getRecipients();
    for (int i = 0; i < recipients.size() - 1; i++) {
      buff.append(recipients.get(i)).append(',');
    }
    if (recipients.size() > 0) {
      buff.append(recipients.get(recipients.size() - 1));
    }
    buff.append("]; processorId=").append(processorId);
  }
Helper class of {@link #toString()}

@param buff buffer in which to append the state of this instance
geode-core/src/main/java/org/apache/geode/internal/cache/tx/RemoteOperationMessage.java