title: Warning: Operand of null-aware operation '!' has type 'SchedulerBinding' which excludes null
body: <p>After updating Flutter 3.0 below compile error occured. This error has no ref to my code. It refers to framework.</p>
  <pre><code>Launching lib/main.dart on Chrome in debug mode...
  lib/main.dart:1
  : Warning: Operand of null-aware operation '!' has type 'SchedulerBinding' which excludes null.
  ../…/src/framework.dart:275
  - 'SchedulerBinding' is from 'package:flutter/src/scheduler/binding.dart' ('../snap/flutter/common/flutter/packages/flutter/lib/src/scheduler/binding.dart').
  package:flutter/…/scheduler/binding.dart:1
      if (SchedulerBinding.instance!.schedulerPhase ==
  </code></pre>