toJson method Null safety

Map<String, dynamic> toJson()

Implementation

core.Map<core.String, core.dynamic> toJson() => {
      if (etag != null) 'etag': etag!,
      if (items != null) 'items': items!,
      if (kind != null) 'kind': kind!,
      if (nextPageToken != null) 'nextPageToken': nextPageToken!,
    };