toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (languageCodes != null) 'languageCodes': languageCodes!,
if (name != null) 'name': name!,
if (naturalSampleRateHertz != null)
'naturalSampleRateHertz': naturalSampleRateHertz!,
if (ssmlGender != null) 'ssmlGender': ssmlGender!,
};