code: public static void write(XID id, DataOutput out) throws IOException {
  		out.writeLong(id.uuid.getMostSignificantBits());
  		out.writeLong(id.uuid.getLeastSignificantBits());
  	}
docs: Serializes an XID object binarily to a data output stream.
  
  @param id
  XID to be serialized.
  @param out
  Data output to store XID serialization.