protected override object DeserializeTimestamp(FirestoreDb db, wkt::Timestamp value) => value.Clone();
protected override object DeserializeTimestamp(DeserializationContext context, wkt::Timestamp value) => value.Clone();
protected override object DeserializeTimestamp(FirestoreDb db, wkt::Timestamp value) => value.Clone();
protected override object DeserializeTimestamp(DeserializationContext context, wkt::Timestamp value) => value.Clone();