toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (effectsProfileId != null) 'effectsProfileId': effectsProfileId!,
if (pitch != null) 'pitch': pitch!,
if (speakingRate != null) 'speakingRate': speakingRate!,
if (voice != null) 'voice': voice!,
if (volumeGainDb != null) 'volumeGainDb': volumeGainDb!,
};