onnect Driver
            </paper-button>

            <!-- Collapsible section for Driver settings -->
            <iron-collapse opened="[[ _showDetails ]]">
                <ndb-driver-settings instances="[[ instances ]]"
                                     is-driver-connected="[[ isDriverConnected ]]">
                </ndb-driver-settings>
            </iron-collapse>
        </ndb-card>
    </template>

    <script>
        Polymer({

            is: 'ndb-driver-selector',

            properties: {
