-from descriptor_topics import VnfdTopic, NsdTopic, PduTopic
-from instance_topics import NsrTopic, VnfrTopic, NsLcmOpTopic
+from descriptor_topics import VnfdTopic, NsdTopic, PduTopic, NstTopic
+from instance_topics import NsrTopic, VnfrTopic, NsLcmOpTopic, NsiTopic, NsiLcmOpTopic