How to use the rc-cts.rc_cts.components.threat_webservice.ThreatServiceLookupEvent function in rc-cts

def __init__(self, request_id=None, name="unknown", artifact=None, channel=searcher_channel()):
        super(ThreatServiceLookupEvent, self).__init__(name=name)

        self.channels = (channel,)
        self.request_id = request_id
        self.cts_channel = channel
        self.artifact = artifact
        self.name = name

# because this is used in 'resutil threatservicetest'
            # and we want to return an immediate (not async) response
            return response_object

        # If we already have a completed query for this key, return it immmediately
        request_data = self.cache.get(cache_key)
        if request_data and request_data.get("complete"):
            response_object["hits"] = request_data.get("hits", [])
            return response_object

        response.status = 303
        response_object["retry_secs"] = self.first_retry_secs

        # Add the request to the cache, then notify searchers that there's a new request
        self.cache.setdefault(cache_key, {"id": request_id, "artifact": body, "hits": [], "complete": False})
        evt = ThreatServiceLookupEvent(request_id=request_id, name=artifact_type, artifact=body, channel=cts_channel)
        self.async_helper.fire(evt, HELPER_CHANNEL)

        return response_object

def _lookup_complete(self, event, *args, **kwargs):
        """
        A lookup event was completed
        """
        if not isinstance(event.parent, ThreatServiceLookupEvent):
            return
        results = event.parent.value.getValue()
        artifact = event.parent.artifact
        cts_channel = event.parent.cts_channel
        request_id = event.parent.request_id

        LOG.info("Lookup complete: %s, %s", event.parent, results)

        # Depending on how many components handled this lookup event,
        # the results can be a single value (dict), or an array, or None,
        # or an exception, or a tuple (type, exception, traceback)
        hits = []
        complete = True
        if isinstance(results, list):
            for result in results:
                if result: