@Override
    public byte[] getSerializedValue() {
      if (serializedValue != null) {
        return serializedValue;
      }
      return callWithOffHeapLock(CachedDeserializable::getSerializedValue);
    }
this method joins together version tag timestamps and the "lastModified" timestamps generated
and stored in entries. If a change does not already carry a lastModified timestamp

@return the timestamp to store in the entry
geode-core/src/main/java/org/apache/geode/internal/cache/EntryEventImpl.java