How to use the angular-in-memory-web-api.STATUS.CREATED function in angular-in-memory-web-api

post(reqInfo: RequestInfo) {
    const collectionName = reqInfo.collectionName;
    if (collectionName === 'notifications' || collectionName === 'subscription') {
      reqInfo.collection[0].push((reqInfo.req as any).body);
      reqInfo.collection[1] = reqInfo.collection[1] + 1;
      const options: ResponseOptions = {
        status: STATUS.CREATED,
      };
      return reqInfo.utils.createResponse$(() => {
        return this.finishOptions(options, reqInfo);
      });
    } else {
      return undefined; // let the default POST handle all others
    }
  }