WidgetsBinding.instance.addPostFrameCallback doesn't work anymore

Question

I used to use

  WidgetsBinding.instance.addPostFrameCallback((_){

for doing something after widget is built.

However after updating flutter this error occurs

Error: Method 'addPostFrameCallback' cannot be called on 'WidgetsBinding?' because it is potentially null.
 - 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('../../../fvm/versions/stable/packages/flutter/lib/src/widgets/binding.dart').

Is there any workaround??

Answer 1

Try adding a ! after instance like so WidgetsBinding.instance!.addPostFrameCallback