Check in codegen test expectations.

test/codegen/expect/language/setter_override2_test_03_multi.js

+dart_library.library('language/setter_override2_test_03_multi', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__setter_override2_test_03_multi(exports, dart_sdk, expect) {
+  'use strict';
+  const core = dart_sdk.core;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const expect$ = expect.expect;
+  const setter_override2_test_03_multi = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  setter_override2_test_03_multi.A = class A extends core.Object {
+    set foo(value) {}
+  };
+  setter_override2_test_03_multi.B = class B extends setter_override2_test_03_multi.A {
+    new() {
+      this.foo_ = null;
+    }
+    set foo(value) {
+      this.foo_ = value;
+    }
+  };
+  setter_override2_test_03_multi.main = function() {
+    let b = new setter_override2_test_03_multi.B();
+    b.foo = 42;
+    expect$.Expect.equals(42, b.foo_);
+  };
+  dart.fn(setter_override2_test_03_multi.main, VoidTodynamic());
+  // Exports:
+  exports.setter_override2_test_03_multi = setter_override2_test_03_multi;
+});