lass="table datagrid-table table-bordered
    ">
        <thead>
          <tr>
            <th class="">
              Show Header
              <i ref="tooltip" tabindex="0" data-title="My Tooltip" class="fa fa-question-circle text-muted" data-tooltip="My Tooltip"></i>
            </th>
            <th class="">
            </th>
            <th class="">
            </th>
            <th class="">
              Show Both
            </th>
          </tr>
        </thead>
        <tbody ref="datagrid-data