See this error:
../../../appdev/flutter/.pub-cache/hosted/pub.flutter-io.cn/fsuper_nullsafety-3.0.1/lib/fsuper_nullsafety.dart:330:20: Warning: Operand of null-aware operation '!' has type 'WidgetsBinding' which excludes null.
'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('../../../appdev/flutter/packages/flutter/lib/src/widgets/binding.dart').
WidgetsBinding.instance!.addPostFrameCallback(_handleSizeChanged);
^
../../../appdev/flutter/.pub-cache/hosted/pub.flutter-io.cn/fsuper_nullsafety-3.0.1/lib/fsuper_nullsafety.dart:342:20: Warning: Operand of null-aware operation '!' has type 'WidgetsBinding' which excludes null.
'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('../../../appdev/flutter/packages/flutter/lib/src/widgets/binding.dart').
WidgetsBinding.instance!.addPostFrameCallback(_handleSizeChanged);
^
../../../appdev/flutter/.pub-cache/hosted/pub.flutter-io.cn/fsuper_nullsafety-3.0.1/lib/fsuper_nullsafety.dart:626:22: Warning: Operand of null-aware operation '!' has type 'SchedulerBinding' which excludes null.
'SchedulerBinding' is from 'package:flutter/src/scheduler/binding.dart' ('../../../appdev/flutter/packages/flutter/lib/src/scheduler/binding.dart').
SchedulerBinding.instance!.addPostFrameCallback(postFrameCallback);
^
mdddj
commented
2 years ago
See this error: ../../../appdev/flutter/.pub-cache/hosted/pub.flutter-io.cn/fsuper_nullsafety-3.0.1/lib/fsuper_nullsafety.dart:330:20: Warning: Operand of null-aware operation '!' has type 'WidgetsBinding' which excludes null.