migração flutter 2.2.1

lib/videos/youtube_video_player.dart

@@ -5,19 +5,19 @@ import 'api/youtube_classes.dart';
 
 class YouTubeVideoPlayerScreen extends StatefulWidget {
   final YouTubeItems ytVideo;
-  YouTubeVideoPlayerScreen({@required this.ytVideo});
+  YouTubeVideoPlayerScreen({required this.ytVideo});
   @override
   _YouTubeVideoPlayerScreenState createState() => _YouTubeVideoPlayerScreenState();
 }
 
 class _YouTubeVideoPlayerScreenState extends State<YouTubeVideoPlayerScreen> {
 
-  YoutubePlayerController _controller;
+  late YoutubePlayerController _controller;
   bool _fullScreen = false;
   @override
   void initState() {
     super.initState();
-    _controller = new YoutubePlayerController(initialVideoId: widget.ytVideo.id.videoId);
+    _controller = new YoutubePlayerController(initialVideoId: widget.ytVideo.id!.videoId!);
   }
 
   @override
@@ -58,9 +58,9 @@ class _YouTubeVideoPlayerScreenState extends State<YouTubeVideoPlayerScreen> {
                     padding: const EdgeInsets.all(8.0),
                     child: Column(
                       children: [
-                        Text(widget.ytVideo.snippet.title),
+                        Text(widget.ytVideo.snippet!.title!),
                         SizedBox(height: 10.0,),
-                        Text(widget.ytVideo.snippet.description),                  
+                        Text(widget.ytVideo.snippet!.description!),                  
                       ],
                     ),
                   )