Don't assume that a transform node is consistently deferred or not.

pkg/barback/lib/src/asset_node.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.asset_node;
 
 import 'dart:async';
 
 import 'asset.dart';
 import 'asset_id.dart';
@@ skipping 40 matching lines @@
   Asset _asset;
 
   /// The callback to be called to notify this asset node's creator that the
   /// concrete asset should be generated.
   ///
   /// This is null for non-lazy asset nodes (see [AssetNodeController.lazy]).
   /// Once this is called, it's set to null and [this] is no longer considered
   /// lazy.
   Function _lazyCallback;
 
-  /// Whether this asset's transform is deferred.
-  ///
-  /// See [TransformNode.deferred].
-  bool get deferred => transform != null && transform.deferred;
+  /// Whether this node is lazy, meaning that [force] must be called to
+  /// guarantee that it will eventually become available.
+  bool get isLazy => _lazyCallback != null ||
+      (_origin != null && _origin.isLazy);
 
   /// A broadcast stream that emits an event whenever the node changes state.
   ///
   /// This stream is synchronous to ensure that when a source asset is modified
   /// or removed, the appropriate portion of the asset graph is dirtied before
   /// any [Barback.getAssetById] calls emit newly-incorrect values.
   Stream<AssetState> get onStateChange => _stateChangeController.stream;
 
   /// This is synchronous so that a source being updated will always be
   /// propagated through the build graph before anything that depends on it is
@@ skipping 63 matching lines @@
   /// See [AssetNodeController.lazy].
   void force() {
     if (_origin != null) {
       _origin.force();
     } else if (_lazyCallback != null) {
       _lazyCallback();
       _lazyCallback = null;
     }
   }
 
-  String toString() =>
-    "$state${_lazyCallback == null ? '' : ' lazy'} asset $id";
+  String toString() => "${isLazy ? 'lazy' : state} asset $id";
 }
 
 /// The controller for an [AssetNode].
 ///
 /// This controls which state the node is in.
 class AssetNodeController {
   final AssetNode node;
 
   /// Creates a controller for a dirty node.
   AssetNodeController(AssetId id, [TransformNode transform])
@@ skipping 115 matching lines @@
 
   /// Whether this state is [AssetState.RUNNING].
   bool get isDirty => this == AssetState.RUNNING;
 
   final String name;
 
   const AssetState._(this.name);
 
   String toString() => name;
 }