Update from Google.
--
MOE_MIGRATED_REVID=85702957
diff --git a/src/main/java/com/google/devtools/build/lib/graph/LabelSerializer.java b/src/main/java/com/google/devtools/build/lib/graph/LabelSerializer.java
new file mode 100644
index 0000000..7386583
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/graph/LabelSerializer.java
@@ -0,0 +1,28 @@
+// Copyright 2014 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// All Rights Reserved.
+
+package com.google.devtools.build.lib.graph;
+
+/**
+ * <p> An interface for specifying a user-defined serialization of graph node
+ * labels as strings. </p>
+ */
+public interface LabelSerializer<T> {
+
+ /**
+ * Returns the serialized form of the label of the specified node.
+ */
+ String serialize(Node<T> node);
+}
