What is the reason for this error in Flutter?

Question

----------Error Full Text----------

../../AppData/Local/Pub/Cache/hosted/pub.dartlang.org/fwfh_text_style-2.22.08/lib/fwfh_text_style.dart:11:7: Error: The non-abstract class 'FwfhTextStyle' is missing implementations for these members:

• TextStyle.fontVariations Try to either
• provide an implementation,
• inherit an implementation from a superclass or mixin,
• mark the class as abstract, or
• provide a 'noSuchMethod' implementation.

class FwfhTextStyle extends _TextStyleProxy { ^^^^^^^^^^^^^ /D:/Installion/Flutter/packages/flutter/lib/src/painting/text_style.dart:789:33: Context: 'TextStyle.fontVariations' is defined here. final List<ui.FontVariation>? fontVariations; ^^^^^^^^^^^^^^ ../../AppData/Local/Pub/Cache/hosted/pub.dartlang.org/fwfh_text_style-2.22.08/lib/fwfh_text_style.dart:43:13: Error: The method 'FwfhTextStyle.apply' has fewer named arguments than those of overridden method 'TextStyle.apply'. TextStyle apply({ ^ /D:/Installion/Flutter/packages/flutter/lib/src/painting/text_style.dart:911:13: Context: This is the overridden method ('apply'). TextStyle apply({ ^ ../../AppData/Local/Pub/Cache/hosted/pub.dartlang.org/fwfh_text_style-2.22.08/lib/fwfh_text_style.dart:43:13: Error: The method 'FwfhTextStyle.apply' doesn't have the named parameter 'fontVariations' of overridden method 'TextStyle .apply'. TextStyle apply({ ^ /D:/Installion/Flutter/packages/flutter/lib/src/painting/text_style.dart:911:13: Context: This is the overridden method ('apply'). TextStyle apply({ ^ ../../AppData/Local/Pub/Cache/hosted/pub.dartlang.org/fwfh_text_style-2.22.08/lib/fwfh_text_style.dart:103:13: Error: The method 'FwfhTextStyle.copyWith' has fewer named arguments than those of overridden method 'TextStyle.copyWith '. TextStyle copyWith({ ^ /D:/Installion/Flutter/packages/flutter/lib/src/painting/text_style.dart:814:13: Context: This is the overridden method ('copyWith'). TextStyle copyWith({ ^ ../../AppData/Local/Pub/Cache/hosted/pub.dartlang.org/fwfh_text_style-2.22.08/lib/fwfh_text_style.dart:103:13: Error: The method 'FwfhTextStyle.copyWith' doesn't have the named parameter 'fontVariations' of overridden method 'TextS tyle.copyWith'. TextStyle copyWith({ ^ /D:/Installion/Flutter/packages/flutter/lib/src/painting/text_style.dart:814:13: Context: This is the overridden method ('copyWith'). TextStyle copyWith({ ^

FAILURE: Build failed with an exception.

• Where: Script 'D:\Installion\Flutter\packages\flutter_tools\gradle\flutter.gradle' line: 1159

• What went wrong: Execution failed for task ':app:compileFlutterBuildDebug'.

Process 'command 'D:\Installion\Flutter\bin\flutter.bat'' finished with non-zero exit value 1

Answer 1

I had the same issue, but it was resolved by upgrading fwfh_text_style

flutter pub upgrade fwfh_text_style

Answer 2

it Looks Like the Class _TextStyleProxy Has Some Abstract Functions That u didn't implement in the child FwfhTextStyle after extending it with _TextStyleProxy. implement the functions and the error should go away