toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (appInstanceId != null) 'appInstanceId': appInstanceId!,
if (appInstanceIdToken != null)
'appInstanceIdToken': appInstanceIdToken!,
if (gmpAppId != null) 'gmpAppId': gmpAppId!,
if (sdkVersion != null) 'sdkVersion': sdkVersion!,
};