@Override
  public void fromData(DataInput in,
      DeserializationContext context) throws IOException, ClassNotFoundException {
    super.fromData(in, context);
    processorId = in.readInt();
    txLockId = TXLockIdImpl.createFromData(in);
    serviceName = DataSerializer.readString(in);
    updatedParticipants = InternalDataSerializer.readSet(in);
  }
Update the Grantor with a new set of Participants. This method is meant to be used in a local
context (does <b>NOT</b> involve any messaging)
geode-core/src/main/java/org/apache/geode/internal/cache/locks/TXLockUpdateParticipantsMessage.java