Examples Options of the json.Serializer class usage examples. JSON to BDL deserialization options to allow nullsTo relax deserialization, you can set the allowNullAsDefault option to allow nulls.BDL to JSON serialization options to allow nullsTo relax serialization, you can set the serializeNullAsDefault option to allow nulls.JSON to BDL deserialization option to allow implicit conversionsTo relax deserialization, you can set the allowImplicitConversion option to allow implicit data conversion.