nnect/disconnect the selected Driver -->
            <paper-button class="connect" raised
                          hidden$="[[ isDriverConnected ]]"
                          disabled$="[[ !_selectedDriver ]]"
                          on-click="_connectDriver">
                Connect Driver
            </paper-button>
            <paper-button class="disconnect" raised
                          hidden$="[[ !isDriverConnected ]]"
                          on-click="_disconnectDriver">
                Disc