push json data into a list of objects in flutter

1factory YoutubeResponse.fromJSON(Map<String, dynamic> YoutubeResponseJson) 
2 {
3
4// Below 2 line code is parsing JSON Array of items in our JSON Object (YouttubeResponse)
5
6
7var list = YoutubeResponseJson['items'] as List;
8List<Item> itemsList = list.map((i) => Item.fromJSON(i)).toList();
9
10return new YoutubeResponse(
11    kind: YoutubeResponseJson['kind'],
12    etag: YoutubeResponseJson['etag'],
13    nextPageToken: YoutubeResponseJson['nextPageToken'],
14    regionCode: YoutubeResponseJson['regionCode'],
15    mPageInfo: pageInfo.fromJSON(YoutubeResponseJson['pageInfo']),
16
17    // Here we are returning parsed JSON Array.
18
19    items: itemsList);
20
21  }
22