code: function MemcachedBackend(options) {
    this.type = 'memcached';
    const client = (this.client = createClient(options));
    this._clientGet = promisify(client.get, { context: client });
    this._clientSet = promisify(client.set, { context: client });
    this._clientDel = promisify(client.del, { context: client });
  }
docs: /* Uses anything supporting the memcache protocol