Roll to pickup pool changes

packages/barback/lib/src/asset/asset_node.dart

Index: packages/barback/lib/src/asset/asset_node.dart
diff --git a/packages/barback/lib/src/asset/asset_node.dart b/packages/barback/lib/src/asset/asset_node.dart
index a9e000092d74681e52840bee14660d01ff130ac7..629599c06ed7e6112f6aa52b4e8ee56fab10b5ce 100644
--- a/packages/barback/lib/src/asset/asset_node.dart
+++ b/packages/barback/lib/src/asset/asset_node.dart
@@ -59,8 +59,8 @@ class AssetNode {
 
   /// 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);
+  bool get isLazy =>
+      _lazyCallback != null || (_origin != null && _origin.isLazy);
 
   /// A broadcast stream that emits an event whenever the node changes state.
   ///
@@ -83,7 +83,7 @@ class AssetNode {
   /// The return value of [callback] is piped to the returned Future. If the
   /// asset is removed before becoming available, the returned future will throw
   /// an [AssetNotFoundException].
-  Future/*<T>*/ whenAvailable/*<T>*/(/*=T*/ callback(Asset asset)) {
+  Future<T> whenAvailable<T>(T callback(Asset asset)) {
     return _waitForState((state) => state.isAvailable || state.isRemoved,
         (state) {
       if (state.isRemoved) throw new AssetNotFoundException(id);
@@ -98,7 +98,7 @@ class AssetNode {
   ///
   /// The return value of [callback] is piped to the returned Future.
   Future whenRemoved(callback()) =>
-    _waitForState((state) => state.isRemoved, (_) => callback());
+      _waitForState((state) => state.isRemoved, (_) => callback());
 
   /// Returns a [Future] that completes when [state] changes from its current
   /// value to any other value.
@@ -114,8 +114,8 @@ class AssetNode {
   /// [callback] is called synchronously if this is already in such a state.
   ///
   /// The return value of [callback] is piped to the returned Future.
-  Future/*<T>*/ _waitForState/*<T>*/(bool test(AssetState state),
-      /*=T*/ callback(AssetState state)) {
+  Future<T> _waitForState<T>(
+      bool test(AssetState state), T callback(AssetState state)) {
     if (test(state)) return new Future.sync(() => callback(state));
     return onStateChange.firstWhere(test).then((_) => callback(state));
   }
@@ -172,7 +172,7 @@ class AssetNodeController {
   ///
   /// [callback] is guaranteed to only fire once.
   AssetNodeController.lazy(AssetId id, void callback(),
-          [TransformNode transform])
+      [TransformNode transform])
       : node = new AssetNode._lazy(id, transform, null, callback);
 
   /// Creates a controller for a node whose initial state matches the current