java_gen: add support for object hashing via the guava hash API
diff --git a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/protocol/OFObject.java b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/protocol/OFObject.java
index 852b803..5d37987 100644
--- a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/protocol/OFObject.java
+++ b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/protocol/OFObject.java
@@ -1,9 +1,11 @@
 package org.projectfloodlight.openflow.protocol;
 
+import org.projectfloodlight.openflow.types.PrimitiveSinkable;
+
 
 /**
  * Base interface of all OpenFlow objects (e.g., messages, actions, stats, etc.)
  */
-public interface OFObject extends Writeable {
+public interface OFObject extends Writeable, PrimitiveSinkable {
     OFVersion getVersion();
 }