Check in codegen test expectations.

test/codegen/expect/language/issue15606_test_none_multi.js

Index: test/codegen/expect/language/issue15606_test_none_multi.js
diff --git a/test/codegen/expect/language/issue15606_test_none_multi.js b/test/codegen/expect/language/issue15606_test_none_multi.js
new file mode 100644
index 0000000000000000000000000000000000000000..b10369760ededf520d9c9e645e29305d83782d35
--- /dev/null
+++ b/test/codegen/expect/language/issue15606_test_none_multi.js
@@ -0,0 +1,32 @@
+dart_library.library('language/issue15606_test_none_multi', null, /* Imports */[
+  'dart_sdk'
+], function load__issue15606_test_none_multi(exports, dart_sdk) {
+  'use strict';
+  const core = dart_sdk.core;
+  const _interceptors = dart_sdk._interceptors;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const issue15606_test_none_multi = Object.create(null);
+  let Foo = () => (Foo = dart.constFn(issue15606_test_none_multi.Foo$()))();
+  let JSArrayOfObject = () => (JSArrayOfObject = dart.constFn(_interceptors.JSArray$(core.Object)))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  issue15606_test_none_multi.Foo$ = dart.generic(T => {
+    class Foo extends core.Object {}
+    dart.addTypeTests(Foo);
+    return Foo;
+  });
+  issue15606_test_none_multi.Foo = Foo();
+  dart.defineLazy(issue15606_test_none_multi, {
+    get a() {
+      return JSArrayOfObject().of([new core.Object(), 42]);
+    },
+    set a(_) {}
+  });
+  issue15606_test_none_multi.main = function() {
+    while (false) {
+    }
+  };
+  dart.fn(issue15606_test_none_multi.main, VoidTodynamic());
+  // Exports:
+  exports.issue15606_test_none_multi = issue15606_test_none_multi;
+});