Fragment of raw JSON. When serialized, the .json field is inserted into the resulting string verbatim, without any validation. When deserialized, will contain the raw JSON of one JSON object of any type.
User-defined attribute - specify name for JSON object field. Useful when a JSON object may contain fields, the name of which are not valid D identifiers.
User-defined attribute - only serialize this field if its value is different from its .init value.
User-defined attribute - skip unknown fields when deserializing.
A template that designates fields which should not be serialized to Json.