Moved IPVersion enum to top level
diff --git a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/IPv6Address.java b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/IPv6Address.java
index 1239b74..eb52f67 100644
--- a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/IPv6Address.java
+++ b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/IPv6Address.java
@@ -29,8 +29,8 @@
     }
 
     @Override
-    public IpVersion getIpVersion() {
-        return IpVersion.IPv6;
+    public IPVersion getIpVersion() {
+        return IPVersion.IPv6;
     }
 
     public static IPv6Address of(final byte[] address) {