bloc_init_root.dart

class MyTree extends StatelessWidget {
  @override
  Widget build(BuildContext context){
    return BlocProvider<MyBloc>(
      blocBuilder: () => MyBloc(),
      child: Column(
        children: <Widget>[
          MyChildWidget(),
        ],
      ),
    );
  }
}

class MyChildWidget extends StatelessWidget {
  @override 
  Widget build(BuildContext context){
    MyBloc? myBloc = BlocProvider.of<MyBloc>(context);
    return Container();
  }
}

Hi, I want to make some suggestion.
I think line 18 should be
MyBloc bloc = BlocProvider.of(context);
variable name is missing :(