Quick Assist for creating a constructor for selected final fields.

pkg/analysis_server/lib/src/services/correction/assist.dart

Index: pkg/analysis_server/lib/src/services/correction/assist.dart
diff --git a/pkg/analysis_server/lib/src/services/correction/assist.dart b/pkg/analysis_server/lib/src/services/correction/assist.dart
index 505464468ba2b90e9253ec49e8b90764afd2f301..d9d1370582e2274e5002da77d7bbaceab121398f 100644
--- a/pkg/analysis_server/lib/src/services/correction/assist.dart
+++ b/pkg/analysis_server/lib/src/services/correction/assist.dart
@@ -55,6 +55,10 @@ class AssistKind {
       const AssistKind('CONVERT_INTO_IS_NOT', 30, "Convert into is!");
   static const CONVERT_INTO_IS_NOT_EMPTY = const AssistKind(
       'CONVERT_INTO_IS_NOT_EMPTY', 30, "Convert into 'isNotEmpty'");
+  static const CREATE_FINAL_FIELD_CONSTRUCTOR = const AssistKind(
+      'CREATE_FINAL_FIELD_CONSTRUCTOR',
+      30,
+      "Create constructor for selected final fields.");
   static const EXCHANGE_OPERANDS =
       const AssistKind('EXCHANGE_OPERANDS', 30, "Exchange operands");
   static const EXTRACT_CLASS =