Flutter 项目编译有关 package 文件夹本地化的错误消息

Question

|Blockquote dart "/var/opt/dev/flutter/projects/FlutterPMM/lib/main.dart" lib/models/sale.dart:1:8: 错误: 未找到: 'dart:ui' import 'dart:ui '; ^。 ^../../packages/flutter/lib/src/material/animated_icons.dart:10:8: 错误：未找到：'dart:ui' import 'dart:ui' show lerpDouble; ^../../packages/flutter/lib/src/material/app.dart:5:8: 错误：未找到：'dart:ui' import 'dart:ui' as ui; ^../../packages/flutter/lib/src/material/app_bar_theme.dart:5:8: 错误：未找到：'dart:ui' import 'dart:ui' show lerpDouble; ^../../packages/flutter/lib/src/material/arc.dart:6:8: 错误：未找到：'dart:ui' import 'dart:ui' show lerpDouble; ^../../packages/flutter/lib/src/material/banner_theme.dart:5:8: 错误：未找到：'dart:ui' import 'dart:ui' show lerpDouble; ^../../packages/flutter/lib/src/material/bottom_app_bar_theme.dart:5:8: 错误：未找到：'dart:ui' import 'dart:ui' show lerpDouble; ^../../packages/flutter/lib/src/material/bottom_navigation_bar_theme.dart:5:8: 错误：未找到：'dart:ui' import 'dart:ui' show lerpDouble; ^../../packages/flutter/lib/src/material/bottom_sheet.dart:5:8: 错误：未找到：'dart:ui' import 'dart:ui' show lerpDouble;

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