@Override
    public void fromData(DataInput in,
        DeserializationContext context) throws IOException, ClassNotFoundException {
      super.fromData(in, context);
      adviseePath = DataSerializer.readString(in);
      processorId = in.readInt();
      // set the processor ID to be able to send reply to sender in case of any
      // unexpected exception during deserialization etc.
      ReplyProcessor21.setMessageRPId(processorId);
      profile = DataSerializer.readObject(in);
      exchangeProfiles = in.readBoolean();
      removeProfile = in.readBoolean();
    }
If this processor being used by controller then return ALL members; otherwise defer to super.

@return a Set of the current members
@since GemFire 5.7
geode-core/src/main/java/org/apache/geode/internal/cache/UpdateAttributesProcessor.java