async notifyDocumentCreate(request, document) {
    const rooms = this._test(request, document._source, document._id);

    if (rooms.length > 0) {
      await this.notifyDocument(rooms, request, "in", "create", document);
    }

    return rooms;
  }
Notify about a created document

@param {Request} request
@param {DocumentChanges} document created
@returns {Promise.<Array.<string>>} list of matched rooms