Make hasNext a getter instead of a method.

utils/apidoc/mdn/extract.dart

 #import ("dart:html");
 #import ("dart:json");
 
 // Workaround for HTML lib missing feature.
 Range newRange() {
   return document.createRange();
 }
 
 // Temporary range object to optimize performance computing client rects
 // from text nodes.
@@ skipping 436 matching lines @@
 }
 
 class PostOrderTraversalIterator implements Iterator<Node> {
 
   Node _next;
 
   PostOrderTraversalIterator(Node start) {
     _next = _leftMostDescendent(start);
   }
 
-  bool hasNext() => _next != null;
+  bool get hasNext => _next != null;
 
   Node next() {
     if (_next == null) return null;
     final ret = _next;
     if (_next.nextNode != null) {
       _next = _leftMostDescendent(_next.nextNode);
     } else {
       _next = _next.parent;
     }
     return ret;
@@ skipping 837 matching lines @@
 }
 
 void documentLoaded(event) {
   // Load the database of expected methods and properties with an HttpRequest.
   new HttpRequest.get('${window.location}.json', (req) {
     data = JSON.parse(req.responseText);
     dbEntry = {'members': [], 'srcUrl': pageUrl};
     run();
   });
 }