package barback: Update the comment style generic syntax.

lib/src/graph/phase.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library barback.graph.phase;
 
 import 'dart:async';
 
 import 'package:collection/collection.dart';
 
@@ skipping 241 matching lines @@
           new TransformerClassifier(this, transformer, "$_location.$_index");
       _classifiers[transformer] = classifier;
       classifier.onAsset.listen(_handleOutput);
       _streams.onLogPool.add(classifier.onLog);
       classifier.onStatusChange.listen((_) => _streams.changeStatus(status));
       for (var input in _inputs) {
         classifier.addInput(input);
       }
     }
 
-    var newGroups = DelegatingSet.typed/*<TransformerGroup>*/(
+    var newGroups = DelegatingSet.typed<TransformerGroup>(
         transformers.where((op) => op is TransformerGroup).toSet());
     var oldGroups = _groups.keys.toSet();
     for (var removed in oldGroups.difference(newGroups)) {
       _groups.remove(removed).remove();
     }
 
     for (var added in newGroups.difference(oldGroups)) {
       var runner = new GroupRunner(previous, added, "$_location.$_index");
       _groups[added] = runner;
       runner.onAsset.listen(_handleOutput);
@@ skipping 120 matching lines @@
         .then((state) {
           if (state.isRemoved) return getOutput(asset.id);
           return asset;
         })
         .then((asset) => request.complete(asset))
         .catchError(request.completeError);
   }
 
   String toString() => "phase $_location.$_index";
 }