def export_vm(self, ref, destination, ref2=None, as_vm = False):
        if ref2:
            task_uuid = self.connection.task.create(self.session_uuid, "Exporting snapshot", "Exporting snapshot " + destina
        else:
            task_uuid = self.connection.task.create(self.session_uuid, "Exporting VM", "Exporting VM " + destination)
        self.track_tasks[task_uuid['Value']] = ref2 if ref2 else ref
        url = "http://%s/export?ref=%s&session_id=%s&task_id=%s" % (self.wine.selected_host,
                               ref, self.session_uuid, task_uuid['Value'])
        Thread(target=self.download_export, args=(url,destination, ref, as_vm)).start()