type MarshalerUnmarshaler interface {
	json.Unmarshaler
	json.Marshaler
}

type RoundTripTestCase struct {
	Name   string
	JSON   string
	Object json.Marshaler

	// An error that is expected when `Object` is marshalled to json
	// If `Object` does not exist, then it is inferred from the provided JSON
	ExpectedMarshalError string

	// An error that is expected when the provided JSON is unmarshalled
	// If `JSON` does not exist then this it is inferred from the provided `Object`
	ExpectedUnmarshalError string
}