Support for dart:typed_data

test/codegen/expect/sunflower/dom.js

 dart_library.library('sunflower/dom', window, /* Imports */[
   'dart/_runtime',
   'dart/core'
 ], /* Lazy imports */[
 ], function(exports, dart, core) {
   'use strict';
   let dartx = dart.dartx;
   class Overload extends core.Object {
     Overload() {
     }
   }
   dart.setSignature(Overload, {
     constructors: () => ({Overload: [Overload, []]})
   });
   const overload = dart.const(new Overload());
   class CustomEvent extends core.Object {}
   dart.setSignature(CustomEvent, {
     constructors: () => ({CustomEvent: [CustomEvent, [core.String], {detail: dart.dynamic, bubbles: dart.dynamic, cancelable: dart.dynamic}]})
   });
-  class HTMLCollection extends core.Object {}
+  class HTMLCollection extends core.Object {
+    get(index) {
+      return this["[]"](index);
+    }
+  }
   dart.setSignature(HTMLCollection, {
     methods: () => ({get: [Element, [core.num]]})
   });
   const EventListener = dart.typedef('EventListener', () => dart.functionType(dart.void, [Event]));
   const InputElement = HTMLInputElement;
   const CanvasElement = HTMLCanvasElement;
   const DivElement = HTMLDivElement;
   const ScriptElement = HTMLScriptElement;
   class RenderingContext extends core.Object {}
   class CanvasDrawingStyles extends core.Object {
@@ skipping 16 matching lines @@
   exports.HTMLCollection = HTMLCollection;
   exports.EventListener = EventListener;
   exports.InputElement = InputElement;
   exports.CanvasElement = CanvasElement;
   exports.DivElement = DivElement;
   exports.ScriptElement = ScriptElement;
   exports.RenderingContext = RenderingContext;
   exports.CanvasDrawingStyles = CanvasDrawingStyles;
   exports.CanvasPathMethods = CanvasPathMethods;
 });