1 files changed, 6 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/actions/AbstractAction.java b/src/main/java/com/google/devtools/build/lib/actions/AbstractAction.java
index d34fc3c60d..c7aaa32ed2 100644
--- a/src/main/java/com/google/devtools/build/lib/actions/AbstractAction.java
+++ b/src/main/java/com/google/devtools/build/lib/actions/AbstractAction.java
@@ -230,6 +230,12 @@ public abstract class AbstractAction implements Action, SkylarkValue {
 
   @Override
   public abstract String getMnemonic();
+
+  /**
+   * See the javadoc for {@link com.google.devtools.build.lib.actions.Action} and
+   * {@link com.google.devtools.build.lib.actions.ActionMetadata#getKey()} for the contract for
+   * {@link #computeKey()}.
+   */
   protected abstract String computeKey();
 
   @Override