toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (expirationTimeUsec != null)
'expirationTimeUsec': expirationTimeUsec!,
if (fingerprint != null) 'fingerprint': fingerprint!,
if (key != null) 'key': key!,
if (name != null) 'name': name!,
};