Check in codegen test expectations.

test/codegen/expect/language/dynamic_prefix_core_test_none_multi.js

Index: test/codegen/expect/language/dynamic_prefix_core_test_none_multi.js
diff --git a/test/codegen/expect/language/dynamic_prefix_core_test_none_multi.js b/test/codegen/expect/language/dynamic_prefix_core_test_none_multi.js
new file mode 100644
index 0000000000000000000000000000000000000000..2feff999e45938307767ebd7677ae4be422bf1be
--- /dev/null
+++ b/test/codegen/expect/language/dynamic_prefix_core_test_none_multi.js
@@ -0,0 +1,18 @@
+dart_library.library('language/dynamic_prefix_core_test_none_multi', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__dynamic_prefix_core_test_none_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 dynamic_prefix_core_test_none_multi = Object.create(null);
+  let VoidTovoid = () => (VoidTovoid = dart.constFn(dart.definiteFunctionType(dart.void, [])))();
+  dynamic_prefix_core_test_none_multi.main = function() {
+    expect$.Expect.isTrue(core.Type.is(dart.wrapType(dart.dynamic)));
+  };
+  dart.fn(dynamic_prefix_core_test_none_multi.main, VoidTovoid());
+  // Exports:
+  exports.dynamic_prefix_core_test_none_multi = dynamic_prefix_core_test_none_multi;
+});