ce in the selected Cluster.
             */
            _checkForConnectedDriver() {
                this._selectedDriver = null;
                this._connectionInfo = null;
                this.isDriverConnected = false;

                if (!this.instances) {
                    return;
                }

                const instanceHost = this.instances[0];
                fetch(`//${instanceHost}/REST/ndbench/driver/getserverstatus`)
                    .then(response => response.json())
            