toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (armIndex != null) 'armIndex': armIndex!,
if (choiceId != null) 'choiceId': choiceId!,
if (group != null) 'group': group!,
if (personalizationId != null) 'personalizationId': personalizationId!,
};