Dropped import during conflict resolution

packages/flutter_tools/test/integration.shard/widget_preview_test.dart

diff --git a/packages/flutter_tools/test/integration.shard/widget_preview_test.dart b/packages/flutter_tools/test/integration.shard/widget_preview_test.dart
index 67811ac..d2c5dab 100644
--- a/packages/flutter_tools/test/integration.shard/widget_preview_test.dart
+++ b/packages/flutter_tools/test/integration.shard/widget_preview_test.dart
@@ -7,6 +7,7 @@
 
 import 'package:dtd/dtd.dart';
 import 'package:file/file.dart';
+import 'package:file_testing/file_testing.dart';
 import 'package:flutter_tools/src/base/io.dart';
 import 'package:flutter_tools/src/base/logger.dart';
 import 'package:flutter_tools/src/commands/widget_preview.dart';