extract named constructor suggestions from prefixed element contributor

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

Index: pkg/analysis_server/test/services/completion/dart/test_all.dart
diff --git a/pkg/analysis_server/test/services/completion/dart/test_all.dart b/pkg/analysis_server/test/services/completion/dart/test_all.dart
index 6d5c8366b12a3e550d8e7a17e923b28903a57afb..67f2b54c11737a89fe9cc064c711fe9df25a1d7b 100644
--- a/pkg/analysis_server/test/services/completion/dart/test_all.dart
+++ b/pkg/analysis_server/test/services/completion/dart/test_all.dart
@@ -7,12 +7,13 @@ library test.services.completion.dart;
 import 'package:unittest/unittest.dart';
 
 import '../../../utils.dart';
-import 'combinator_contributor_test.dart' as combinator_test;
 import 'arglist_contributor_test.dart' as arglist_test;
+import 'combinator_contributor_test.dart' as combinator_test;
 import 'common_usage_sorter_test.dart' as common_usage_test;
 import 'field_formal_contributor_test.dart' as field_formal_contributor_test;
 import 'inherited_contributor_test.dart' as inherited_contributor_test;
 import 'keyword_contributor_test.dart' as keyword_test;
+import 'named_constructor_contributor_test.dart' as named_contributor_test;
 import 'uri_contributor_test.dart' as uri_contributor_test;
 
 /// Utility for manually running all tests.
@@ -25,6 +26,7 @@ main() {
     field_formal_contributor_test.main();
     inherited_contributor_test.main();
     keyword_test.main();
+    named_contributor_test.main();
     uri_contributor_test.main();
   });
 }