private void initVersionsBytes(VersionTag tag) throws IOException {
      if (EntryBits.isWithVersions(userBits)) {
        versionsBytes = serializeVersionTag(tag);
        size += versionsBytes.length;
      }
    }
How many bytes it will be when serialized
geode-core/src/main/java/org/apache/geode/internal/cache/Oplog.java