toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (nextPageToken != null) 'nextPageToken': nextPageToken!,
if (nextSyncToken != null) 'nextSyncToken': nextSyncToken!,
if (otherContacts != null) 'otherContacts': otherContacts!,
if (totalSize != null) 'totalSize': totalSize!,
};