+ * Send Barrier message synchronously. The caller will be blocked until the
+ * Barrier reply arrives.
+ *
+ * @param node
+ * the network node
+ * {@link org.opendaylight.controller.sal.core.Node}
+ * @return Status the operation status
+ * {@link org.opendaylight.controller.sal.utils.Status}
+ */
+ Status syncSendBarrierMessage(Node node);
+
+ /**
+ * Send Barrier message asynchronously. The caller is not blocked.
+ *