Check in codegen test expectations.

test/codegen/expect/language/named_parameters_aggregated_test_none_multi.js

+dart_library.library('language/named_parameters_aggregated_test_none_multi', null, /* Imports */[
+  'dart_sdk'
+], function load__named_parameters_aggregated_test_none_multi(exports, dart_sdk) {
+  'use strict';
+  const core = dart_sdk.core;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const named_parameters_aggregated_test_none_multi = Object.create(null);
+  let TypeTester = () => (TypeTester = dart.constFn(named_parameters_aggregated_test_none_multi.TypeTester$()))();
+  let TypeTesterOfCallback = () => (TypeTesterOfCallback = dart.constFn(named_parameters_aggregated_test_none_multi.TypeTester$(named_parameters_aggregated_test_none_multi.Callback)))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  named_parameters_aggregated_test_none_multi.TypeTester$ = dart.generic(T => {
+    class TypeTester extends core.Object {}
+    dart.addTypeTests(TypeTester);
+    return TypeTester;
+  });
+  named_parameters_aggregated_test_none_multi.TypeTester = TypeTester();
+  named_parameters_aggregated_test_none_multi.Callback = dart.typedef('Callback', () => dart.functionType(dart.void, [], [core.String]));
+  const _handler = Symbol('_handler');
+  named_parameters_aggregated_test_none_multi.NamedParametersAggregatedTests = class NamedParametersAggregatedTests extends core.Object {
+    new() {
+      this[_handler] = null;
+    }
+    static F31(a, opts) {
+      let b = opts && 'b' in opts ? opts.b : 20;
+      let c = opts && 'c' in opts ? opts.c : 30;
+      return 100 * (100 * dart.notNull(a) + dart.notNull(b)) + dart.notNull(c);
+    }
+    static f_missing_comma(a) {
+      return core.int._check(a);
+    }
+    InstallCallback(cb) {
+      this[_handler] = cb;
+    }
+  };
+  dart.setSignature(named_parameters_aggregated_test_none_multi.NamedParametersAggregatedTests, {
+    methods: () => ({InstallCallback: dart.definiteFunctionType(dart.void, [dart.functionType(dart.void, [], {msg: core.String})])}),
+    statics: () => ({
+      F31: dart.definiteFunctionType(core.int, [core.int], {b: core.int, c: core.int}),
+      f_missing_comma: dart.definiteFunctionType(core.int, [dart.dynamic])
+    }),
+    names: ['F31', 'f_missing_comma']
+  });
+  named_parameters_aggregated_test_none_multi.main = function() {
+    named_parameters_aggregated_test_none_multi.NamedParametersAggregatedTests.f_missing_comma(10);
+    named_parameters_aggregated_test_none_multi.NamedParametersAggregatedTests.F31(10, {b: 25});
+    new (TypeTesterOfCallback())();
+    new named_parameters_aggregated_test_none_multi.NamedParametersAggregatedTests().InstallCallback(null);
+  };
+  dart.fn(named_parameters_aggregated_test_none_multi.main, VoidTodynamic());
+  // Exports:
+  exports.named_parameters_aggregated_test_none_multi = named_parameters_aggregated_test_none_multi;
+});