toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (address != null) 'address': address!,
if (enableUspsCass != null) 'enableUspsCass': enableUspsCass!,
if (languageOptions != null) 'languageOptions': languageOptions!,
if (previousResponseId != null)
'previousResponseId': previousResponseId!,
if (sessionToken != null) 'sessionToken': sessionToken!,
};