Error: Method 'addPostFrameCallback' cannot be called on 'WidgetsBinding?'

[arnabonetraker]

This package is giving this error during build.

Error: Method 'addPostFrameCallback' cannot be called on 'WidgetsBinding?' because it is potentially null.
 - 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('../../Development/flutter/packages/flutter/lib/src/widgets/binding.dart').
Try calling using ?. instead.
    WidgetsBinding.instance.addPostFrameCallback((_) {
                            ^^^^^^^^^^^^^^^^^^^^


FAILURE: Build failed with an exception.

Changing WidgetsBinding.instance.addPostFrameCallback to WidgetsBinding.instance?.addPostFrameCallback solves the issue.

flutter doctor

[✓] Flutter (Channel stable, 2.10.5, on macOS 12.6 21G115 darwin-x64, locale en-IN)
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[✓] Android Studio (version 2021.2)
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