+ * the network node
+ * {@link org.opendaylight.controller.sal.core.Node} on which the
+ * flow got modified
+ * @param oldFlow
+ * the original flow
+ * {@link org.opendaylight.controller.sal.flowprogrammer.Flow}
+ * @param newFlow
+ * the new flow
+ * {@link org.opendaylight.controller.sal.flowprogrammer.Flow}