[wildcards] ensure overridden signatures preserve wildcards

See: #56361

Change-Id: I0d37f8b3e034d123410151d3a82acdee5bc8fe9d
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/378566
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Phil Quitslund <pquitslund@google.com>

pkg/analyzer_plugin/test/src/utilities/change_builder/change_builder_dart_test.dart

@@ -17,6 +17,7 @@ import 'package:analyzer/src/test_utilities/package_config_file_builder.dart';
 import 'package:analyzer_plugin/protocol/protocol_common.dart' hide Element;
 import 'package:analyzer_plugin/src/utilities/change_builder/change_builder_dart.dart'
     show DartFileEditBuilderImpl, DartLinkedEditBuilderImpl;
+import 'package:analyzer_utilities/test/experiments/experiments.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
@@ -3828,6 +3829,28 @@ class B extends A {
     );
   }
 
+  Future<void> test_method_wildcardParams() async {
+    createAnalysisOptionsFile(experiments: experimentsForTests);
+
+    await _assertWriteOverride(
+      content: '''
+class A {
+  void m(int _, [int _]) { }
+}
+class B extends A {
+}
+''',
+      nameToOverride: 'm',
+      expected: '''
+  @override void m(int _, [int _]) {
+    // TODO: implement m
+  }
+''',
+      displayText: 'm(int _, [int _]) { … }',
+      selection: SourceRange(122, 0),
+    );
+  }
+
   Future<void> test_mixin_method_of_interface() async {
     await _assertWriteOverride(
       content: '''