问TDesign flutter使用组件时报错：IconData不能被继承？

使用组件时报错，如下：

/C:/Users/Peijie_T/AppData/Local/Pub/Cache/hosted/pub.flutter-io.cn/tdesign_flutter-0.2.7/lib/src/components/icon/td_icons.dart:7:28: Error: The class 'IconData' can't be extended outside of its library because it's a final

class.

class _TDIconsData extends IconData {...

看了下源码，flutter的IconData被final修饰的，但是TDesign的_TDIconsData类却继承了它

环境：

Flutter 3.44.0 • channel stable • https://github.com/flutter/flutter.git

Framework • revision 559ffa3f75 (2 weeks ago) • 2026-05-15 14:13:13 -0700

Engine • hash fcf463a2242790d1fdcd9d044f533080f5022e18 (revision 4c525dac5e) (16 days ago) • 2026-05-15 19:00:04.000Z

Tools • Dart 3.12.0 • DevTools 2.57.0