@Test
  void objectId() throws IOException {
    ObjectId id = ObjectId.get();
    check(Parsers.parserAt(new BsonObjectId(id)).getText()).is(id.toHexString());
  }
Validate different type conversions like {@code DateTime => Long => String}
criteria/mongo/test/org/immutables/criteria/mongo/bson4jackson/TypeConversionTest.java