Check in codegen test expectations.

test/codegen/expect/language/compile_time_constant_r_test_none_multi.js

+dart_library.library('language/compile_time_constant_r_test_none_multi', null, /* Imports */[
+  'dart_sdk'
+], function load__compile_time_constant_r_test_none_multi(exports, dart_sdk) {
+  'use strict';
+  const core = dart_sdk.core;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const compile_time_constant_r_test_none_multi = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  compile_time_constant_r_test_none_multi.x = "x";
+  compile_time_constant_r_test_none_multi.y = dart.const(dart.map([0, "y"]));
+  compile_time_constant_r_test_none_multi.main = function() {
+    core.print(compile_time_constant_r_test_none_multi.x);
+    core.print(compile_time_constant_r_test_none_multi.y);
+    let z = 1 + 1 + 1;
+    core.print(z);
+  };
+  dart.fn(compile_time_constant_r_test_none_multi.main, VoidTodynamic());
+  // Exports:
+  exports.compile_time_constant_r_test_none_multi = compile_time_constant_r_test_none_multi;
+});