使用插件出现问题

[FreeSky-X]

flukit-3.0.1/lib/src/safe_value_notifier.dart:20:33: Error: Method 'addPostFrameCallback' cannot be called on 'SchedulerBinding?' because it is potentially null.

• 'SchedulerBinding' is from 'package:flutter/src/scheduler/binding.dart' ('/D:/flutter/packages/flutter/lib/src/scheduler/binding.dart').
  package:flutter/…/scheduler/binding.dart:1
  Try calling using ?. instead.
  SchedulerBinding.instance.addPostFrameCallback((_) {