dart2js send stats, includes:

pkg/compiler/lib/src/world.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library dart2js.world;
 
 import 'closure.dart' show
     SynthesizedCallMethodElementX;
 import 'common/backend_api.dart' show
     Backend;
@@ skipping 69 matching lines @@
   bool isSubtypeOf(ClassElement x, ClassElement y);
 
   /// Returns an iterable over the live classes that extend [cls] including
   /// [cls] itself.
   Iterable<ClassElement> subclassesOf(ClassElement cls);
 
   /// Returns an iterable over the live classes that extend [cls] _not_
   /// including [cls] itself.
   Iterable<ClassElement> strictSubclassesOf(ClassElement cls);
 
+  /// Returns an iterable over the directly instantiated that implement [cls]
+  /// possibly including [cls] itself, if it is live.
+  Iterable<ClassElement> subtypesOf(ClassElement cls);
+
   /// Returns an iterable over the live classes that implement [cls] _not_
   /// including [cls] if it is live.
   Iterable<ClassElement> strictSubtypesOf(ClassElement cls);
 
   /// Returns `true` if [a] and [b] have any known common subtypes.
   bool haveAnyCommonSubtypes(ClassElement a, ClassElement b);
 
   /// Returns `true` if any live class other than [cls] extends [cls].
   bool hasAnyStrictSubclass(ClassElement cls);
 
@@ skipping 111 matching lines @@
   Iterable<ClassElement> strictSubclassesOf(ClassElement cls) {
     ClassHierarchyNode subclasses = _classHierarchyNodes[cls.declaration];
     if (subclasses == null) return const <ClassElement>[];
     return subclasses.subclasses(
         strict: true,
         includeIndirectlyInstantiated: false,
         includeUninstantiated: false);
   }
 
   /// Returns an iterable over the directly instantiated that implement [cls]
+  /// possibly including [cls] itself, if it is live.
+  Iterable<ClassElement> subtypesOf(ClassElement cls) {
+    ClassSet classSet = _classSets[cls.declaration];
+    if (classSet == null) {
+      return const <ClassElement>[];
+    } else {
+      return classSet.subtypes(
+          includeIndirectlyInstantiated: false,
+          includeUninstantiated: false);
+    }
+  }
+
+  /// Returns an iterable over the directly instantiated that implement [cls]
   /// _not_ including [cls].
   Iterable<ClassElement> strictSubtypesOf(ClassElement cls) {
     ClassSet classSet = _classSets[cls.declaration];
     if (classSet == null) {
       return const <ClassElement>[];
     } else {
       return classSet.subtypes(
           strict: true,
           includeIndirectlyInstantiated: false,
           includeUninstantiated: false);
@@ skipping 444 matching lines @@
     // function expressions's element.
     // TODO(herhut): Generate classes for function expressions earlier.
     if (element is SynthesizedCallMethodElementX) {
       return getMightBePassedToApply(element.expression);
     }
     return functionsThatMightBePassedToApply.contains(element);
   }
 
   bool get hasClosedWorldAssumption => !compiler.hasIncrementalSupport;
 }