a few small refactorings to closure workarounds

test/codegen/expect/collection/src/iterable_zip.js

Index: test/codegen/expect/collection/src/iterable_zip.js
diff --git a/test/codegen/expect/collection/src/iterable_zip.js b/test/codegen/expect/collection/src/iterable_zip.js
index 35dd2927b353a6cd6be675e23ab62061f3b80f39..f4eeecf4ee421a743c51168e87f374da2dff3018 100644
--- a/test/codegen/expect/collection/src/iterable_zip.js
+++ b/test/codegen/expect/collection/src/iterable_zip.js
@@ -1,9 +1,9 @@
 dart_library.library('collection/src/iterable_zip', null, /* Imports */[
   'dart/_runtime',
-  'dart/collection',
-  'dart/core'
+  'dart/core',
+  'dart/collection'
 ], /* Lazy imports */[
-], function(exports, dart, collection, core) {
+], function(exports, dart, core, collection) {
   'use strict';
   let dartx = dart.dartx;
   const _iterables = Symbol('_iterables');