Issue 23444. Use ConstructorMember(s) for super constructor fixes.

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

Index: pkg/analysis_server/lib/src/services/correction/fix_internal.dart
diff --git a/pkg/analysis_server/lib/src/services/correction/fix_internal.dart b/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
index 25dfa1c7a7f2360735720687f7393ce91ad2d730..cf8676db313a2ee6fedf1b343fbdb9f12dd7d2a7 100644
--- a/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
+++ b/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
@@ -562,10 +562,9 @@ class FixProcessor {
     ClassDeclaration targetClassNode =
         targetConstructor.parent as ClassDeclaration;
     ClassElement targetClassElement = targetClassNode.element;
-    ClassElement superClassElement = targetClassElement.supertype.element;
+    InterfaceType superType = targetClassElement.supertype;
     // add proposals for all super constructors
-    List<ConstructorElement> superConstructors = superClassElement.constructors;
-    for (ConstructorElement superConstructor in superConstructors) {
+    for (ConstructorElement superConstructor in superType.constructors) {
       String constructorName = superConstructor.name;
       // skip private
       if (Identifier.isPrivateName(constructorName)) {
@@ -626,11 +625,11 @@ class FixProcessor {
   void _addFix_createConstructorSuperImplicit() {
     ClassDeclaration targetClassNode = node.parent as ClassDeclaration;
     ClassElement targetClassElement = targetClassNode.element;
-    ClassElement superClassElement = targetClassElement.supertype.element;
+    InterfaceType superType = targetClassElement.supertype;
     String targetClassName = targetClassElement.name;
     // add proposals for all super constructors
-    List<ConstructorElement> superConstructors = superClassElement.constructors;
-    for (ConstructorElement superConstructor in superConstructors) {
+    for (ConstructorElement superConstructor in superType.constructors) {
+      superConstructor = ConstructorMember.from(superConstructor, superType);
       String constructorName = superConstructor.name;
       // skip private
       if (Identifier.isPrivateName(constructorName)) {