Warning: Operand of null-aware operation '!' has type 'SchedulerBinding' which excludes null. - 'SchedulerBinding' is from 'package:flutter/src/scheduler/binding.dart'

[trojancode]

This is my log.

/opt/homebrew/Caskroom/flutter/2.10.3/flutter/.pub-cache/hosted/pub.dartlang.org/charts_flutter-0.12.0/lib/src/chart_container.dart:205:27:
Warning: Operand of null-aware operation '!' has type 'SchedulerBinding' which excludes null.
 - 'SchedulerBinding' is from 'package:flutter/src/scheduler/binding.dart'
 ('/opt/homebrew/Caskroom/flutter/2.10.3/flutter/packages/flutter/lib/src/scheduler/binding.dart').
    if (!SchedulerBinding.instance!.hasScheduledFrame) {
                          ^
/opt/homebrew/Caskroom/flutter/2.10.3/flutter/.pub-cache/hosted/pub.dartlang.org/charts_flutter-0.12.0/lib/src/chart_container.dart:206:24:
Warning: Operand of null-aware operation '!' has type 'SchedulerBinding' which excludes null.
 - 'SchedulerBinding' is from 'package:flutter/src/scheduler/binding.dart'
 ('/opt/homebrew/Caskroom/flutter/2.10.3/flutter/packages/flutter/lib/src/scheduler/binding.dart').
      SchedulerBinding.instance!.scheduleFrame();
                       ^
/opt/homebrew/Caskroom/flutter/2.10.3/flutter/.pub-cache/hosted/pub.dartlang.org/charts_flutter-0.12.0/lib/src/chart_container.dart:209:22:
Warning: Operand of null-aware operation '!' has type 'SchedulerBinding' which excludes null.
 - 'SchedulerBinding' is from 'package:flutter/src/scheduler/binding.dart'
 ('/opt/homebrew/Caskroom/flutter/2.10.3/flutter/packages/flutter/lib/src/scheduler/binding.dart').
    SchedulerBinding.instance!.addPostFrameCallback(startAnimationController);
                     ^
/opt/homebrew/Caskroom/flutter/2.10.3/flutter/.pub-cache/hosted/pub.dartlang.org/charts_flutter-0.12.0/lib/src/chart_container.dart:232:22:
Warning: Operand of null-aware operation '!' has type 'SchedulerBinding' which excludes null.
 - 'SchedulerBinding' is from 'package:flutter/src/scheduler/binding.dart'
 ('/opt/homebrew/Caskroom/flutter/2.10.3/flutter/packages/flutter/lib/src/scheduler/binding.dart').
    SchedulerBinding.instance!.addPostFrameCallback(doRebuild);

[Kimsoer]

please help fixed it