toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (etag != null) 'etag': etag!,
if (key != null) 'key': key!,
if (kind != null) 'kind': kind!,
if (selfLink != null) 'selfLink': selfLink!,
if (value != null) 'value': value!,
if (visibility != null) 'visibility': visibility!,
};