The value of local variable isn't used - flutter

Question

I am new to flutter and I was following a tutorial when this error popped up. The ancestorRenderObjectOfType has deprecated and been replaced by findAncestorRenderObjectOfType so dart is throwing me errors.
What the tutor did in his video of old dart:
static T of<T extends BlocBase>(BuildContext context) {
final type = _typeOf<BlocProvider<T>>();
BlocProvider<T> provider = context
.context.ancestorRenderObjectOfType(type);
return provider.bloc;
}
static Type _typeOf() => T;
}
What I did in my code
static T of<T extends BlocBase>(BuildContext context) {
final type = _typeOf<BlocProvider<T>>();
BlocProvider<T> provider = context
.findAncestorRenderObjectOfType();
return provider.bloc;
}
static Type _typeOf<T>() => T;
}
If I put
BlocProvider<T> provider = context
.findAncestorRenderObjectOfType(type);
I get an error saying
Too many positional arguements. 0 expected, but 1 found.
The ENTIRE code
abstract class BlocBase {
void dispose();
}
//Genric Bloc provider
class BlocProvider<T extends BlocBase> extends StatefulWidget {
BlocProvider({
Key key,
#required this.child,
#required this.bloc,
}) : super(key: key);
final T bloc;
final Widget child;
#override
_BlocProviderState<T> createState() => _BlocProviderState<T>();
static T of<T extends BlocBase>(BuildContext context) {
final type = _typeOf<BlocProvider<T>>();
BlocProvider<T> provider = context
.findAncestorRenderObjectOfType(); //context.ancestorRenderObjectOfType(type); GOTCHA
return provider.bloc;
}
static Type _typeOf<T>() => T;
}
class _BlocProviderState<T> extends State<BlocProvider<BlocBase>> {
#override
void dispose() {
widget.bloc.dispose();
super.dispose();
}
#override
Widget build(BuildContext context) {
return widget.child;
}
}
Thank you!

Answer 1

findAncestorRenderObjectOfType doesnt take the type as argument instead it is a generic method where you can provide the type while calling the method. So your code will be as below:
static T of<T>(BuildContext context) {
BlocProvider<T> provider = context
.findAncestorRenderObjectOfType<BlocProvider<T>>();
return provider.bloc;
}