Elements. MockLibraryImportElement is not PrefixFragment.

However it knows its libraryFragment.

Change-Id: I076aa4135c5b69ecff57ae821b76ae954de78d59
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/438400
Reviewed-by: Brian Wilkerson <[email protected]>
Commit-Queue: Konstantin Shcheglov <[email protected]>

Author: scheglov

pkg/analysis_server/lib/src/services/refactoring/legacy/rename_import.dart

@@ -93,7 +93,11 @@ class RenameImportRefactoringImpl extends RenameRefactoringImpl {
         }
       }
       if (edit != null) {
-        doSourceChange_addFragmentEdit(change, element, edit);
+        doSourceChange_addSourceEdit(
+          change,
+          element.libraryFragment.source,
+          edit,
+        );
       }
     }
     // update references

pkg/analyzer/lib/src/utilities/extensions/element.dart

@@ -10,7 +10,7 @@ import 'package:analyzer/src/dart/element/member.dart';
 import 'package:analyzer/src/dart/element/type.dart';
 import 'package:meta/meta.dart';
 
-class MockLibraryImportElement implements Element, PrefixFragment {
+class MockLibraryImportElement implements Element {
   final LibraryImportImpl import;
 
   MockLibraryImportElement(LibraryImport import)
@@ -25,7 +25,6 @@ class MockLibraryImportElement implements Element, PrefixFragment {
   @override
   LibraryElementImpl get library => libraryFragment.element;
 
-  @override
   LibraryFragmentImpl get libraryFragment => import.libraryFragment;
 
   @override