fix invocation completion test

pkg/analysis_server/test/services/search/hierarchy_test.dart

Index: pkg/analysis_server/test/services/search/hierarchy_test.dart
diff --git a/pkg/analysis_server/test/services/search/hierarchy_test.dart b/pkg/analysis_server/test/services/search/hierarchy_test.dart
index 1dad0995bf2e056b864f2ae0283ef051e9095060..87f5eb55cd65deda4c8d8ba64ddace64b3977737 100644
--- a/pkg/analysis_server/test/services/search/hierarchy_test.dart
+++ b/pkg/analysis_server/test/services/search/hierarchy_test.dart
@@ -220,14 +220,14 @@ class B extends A {
       List<Element> members = getMembers(classA);
       expect(
           members.map((e) => e.name),
-          unorderedEquals(['ma1', 'ma2', '==', 'toString']));
+          unorderedEquals(['ma1', 'ma2', '==', 'toString', 'hashCode']));
     }
     {
       ClassElement classB = findElement('B');
       List<Element> members = getMembers(classB);
       expect(
           members.map((e) => e.name),
-          unorderedEquals(['mb1', 'mb2', 'ma1', 'ma2', '==', 'toString']));
+          unorderedEquals(['mb1', 'mb2', 'ma1', 'ma2', '==', 'toString', 'hashCode']));
     }
   }