toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (audio != null) 'audio': audio!,
if (dtmf != null) 'dtmf': dtmf!,
if (event != null) 'event': event!,
if (intent != null) 'intent': intent!,
if (languageCode != null) 'languageCode': languageCode!,
if (text != null) 'text': text!,
};