.deselectAll()">Clear Selection</button>
            </span>
            <span style="margin-left: 20px;">
                Column API:
                <button onclick="document.querySelector('#myGrid').columnApi.hideColumn('country', true)">Hide Country Column</button>
                <button onclick="document.querySelector('#myGrid').columnApi.hideColumn('country', false)">Show Country Column</button>
            </span>
        </div>
        <div style="float: right;" class="toolbar">
            <button