Add serialization functionality to classes.

--
MOS_MIGRATED_REVID=89152485

1 files changed, 3 insertions, 1 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/SkylarkFileDependency.java b/src/main/java/com/google/devtools/build/lib/skyframe/SkylarkFileDependency.java
index 02d2e910c7..cfc78a9ec4 100644
--- a/src/main/java/com/google/devtools/build/lib/skyframe/SkylarkFileDependency.java
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/SkylarkFileDependency.java
@@ -17,11 +17,13 @@ package com.google.devtools.build.lib.skyframe;
 import com.google.common.collect.ImmutableList;
 import com.google.devtools.build.lib.syntax.Label;
 
+import java.io.Serializable;
+
 /**
  * A simple value class to store the direct Skylark file dependencies of a Skylark
  * extension file. It also contains a Label identifying the extension file.
  */
-class SkylarkFileDependency {
+class SkylarkFileDependency implements Serializable {
 
   private final Label label;
   private final ImmutableList<SkylarkFileDependency> dependencies;