add suggestion for partial named parameter - fixes #24758

pkg/analysis_server/test/services/completion/dart/arglist_contributor_test.dart

Index: pkg/analysis_server/test/services/completion/dart/arglist_contributor_test.dart
diff --git a/pkg/analysis_server/test/services/completion/dart/arglist_contributor_test.dart b/pkg/analysis_server/test/services/completion/dart/arglist_contributor_test.dart
index 273509c375642af0408b609fee5c857e9536b488..1b2ca1c67101e6e78b76b4b6e05bfecd9b0d8fcd 100644
--- a/pkg/analysis_server/test/services/completion/dart/arglist_contributor_test.dart
+++ b/pkg/analysis_server/test/services/completion/dart/arglist_contributor_test.dart
@@ -302,6 +302,27 @@ library libA; class A { A({int one, String two: 'defaultValue'}) { } }''');
     assertNoSuggestions();
   }
 
+  test_ArgumentList_imported_function_named_param_label1() async {
+    //
+    addTestSource('main() { int.parse("16", r^: 16);}');
+    await computeSuggestions();
+    assertSuggestArguments(namedArguments: ['radix', 'onError']);
+  }
+
+  test_ArgumentList_imported_function_named_param_label2() async {
+    //
+    addTestSource('main() { int.parse("16", ^r: 16);}');
+    await computeSuggestions();
+    assertSuggestArguments(namedArguments: ['radix', 'onError']);
+  }
+
+  test_ArgumentList_imported_function_named_param_label3() async {
+    //
+    addTestSource('main() { int.parse("16", ^: 16);}');
+    await computeSuggestions();
+    assertSuggestArguments(namedArguments: ['radix', 'onError']);
+  }
+
   test_ArgumentList_local_constructor_named_param() async {
     //
     addTestSource('''