toJson method
Serialize to a JSON-encodable map, omitting absent members.
Implementation
Map<String, dynamic> toJson() => <String, dynamic>{
'tier': tier.value,
if (signingAlg != null) 'signingAlg': signingAlg!,
if (keyAgreementCurve != null) 'keyAgreementCurve': keyAgreementCurve!,
};