Check in codegen test expectations.

test/codegen/expect/language/top_level_getter_arrow_syntax_test.js

+dart_library.library('language/top_level_getter_arrow_syntax_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__top_level_getter_arrow_syntax_test(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 top_level_getter_arrow_syntax_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  dart.copyProperties(top_level_getter_arrow_syntax_test, {
+    get getter() {
+      return 42;
+    }
+  });
+  dart.copyProperties(top_level_getter_arrow_syntax_test, {
+    get lgetter() {
+      return null;
+    }
+  });
+  dart.copyProperties(top_level_getter_arrow_syntax_test, {
+    get two_wrongs() {
+      return !true;
+    }
+  });
+  top_level_getter_arrow_syntax_test.main = function() {
+    expect$.Expect.equals(42, top_level_getter_arrow_syntax_test.getter);
+    expect$.Expect.equals(null, top_level_getter_arrow_syntax_test.lgetter);
+    expect$.Expect.equals(false, top_level_getter_arrow_syntax_test.two_wrongs);
+  };
+  dart.fn(top_level_getter_arrow_syntax_test.main, VoidTodynamic());
+  // Exports:
+  exports.top_level_getter_arrow_syntax_test = top_level_getter_arrow_syntax_test;
+});