public void initialize(byte opCode, long drId, VersionTag tag) throws IOException {
      this.opCode = opCode;
      assert this.opCode == OPLOG_CONFLICT_VERSION;
      size = 1;// for the opcode
      saveDrId(drId);

      versionsBytes = serializeVersionTag(tag);
      size += versionsBytes.length;
      size++; // for END_OF_RECORD_ID
    }
How many bytes it will be when serialized
geode-core/src/main/java/org/apache/geode/internal/cache/Oplog.java