<tr data-bind="foreach:{data: columns, as: 'column'}">
                      <!--<th data-bind='text: column.displayName, click: $parent.sortPeople.bind($parent, column.name, null), css:{desc: $parent.sortColumn === column.name && $parent.sortDirection === "desc", asc: $parent.sortColumn === column.name && $parent.sortDirection === "asc"}'></th>-->
                      <th data-bind='text: column.displayName, click: $root.columnClick.bind($root, column.name, null), css: $root.sortStatus'></th>
                    </tr>