code: function publish(subject, op, target) {
    try {
      var type = (_.isString(target)) ? target : target.type;
      var topic = getTopic(type);
      // optimization: would be nice to tell if there are subscribers before I bother to create
      var event = new Event(subject, op, target);
      provider.publish(topic, event);
    }
    catch (err) {
      logger.error('unable to publish event', err);
    }
  }
docs: publishing is async