Issue 25538. Fix for notification and private methods.

pkg/analysis_server/test/analysis/notification_overrides_test.dart

Index: pkg/analysis_server/test/analysis/notification_overrides_test.dart
diff --git a/pkg/analysis_server/test/analysis/notification_overrides_test.dart b/pkg/analysis_server/test/analysis/notification_overrides_test.dart
index ae7551ec70fb81f9e34d290b2f56938c7edb7c62..986e1997ce02a903bed7fa336f9728e14113d89e 100644
--- a/pkg/analysis_server/test/analysis/notification_overrides_test.dart
+++ b/pkg/analysis_server/test/analysis/notification_overrides_test.dart
@@ -229,6 +229,24 @@ class B extends A {
     assertNoOverride('fff(x) {} // B');
   }
 
+  test_BAD_privateByPrivate_inDifferentLib() async {
+    addFile(
+        '$testFolder/lib.dart',
+        r'''
+class A {
+  void _m() {}
+}
+''');
+    addTestFile('''
+import 'lib.dart';
+class B extends A {
+  void _m() {} // in B
+}
+''');
+    await prepareOverrides();
+    assertNoOverride('_m() {} // in B');
+  }
+
   test_BAD_setterByGetter() async {
     addTestFile('''
 class A {
@@ -514,6 +532,21 @@ class C extends B {
     assertNoInterfaceMembers();
   }
 
+  test_super_method_privateByPrivate() async {
+    addTestFile('''
+class A {
+  _m() {} // in A
+}
+class B extends A {
+  _m() {} // in B
+}
+''');
+    await prepareOverrides();
+    assertHasOverride('_m() {} // in B');
+    assertHasSuperElement('_m() {} // in A');
+    assertNoInterfaceMembers();
+  }
+
   test_super_method_superTypeCycle() async {
     addTestFile('''
 class A extends B {