getHeaderCell^{(dataIndex: String|Number, [side: String]): Element}

Returns header cell element by column data index or column order.

Example:

var cell = grid.getHeaderCell('name');

cell.addClass('my-cls');

Example:

var cell = grid.getHeaderCell('name');

cell.addClass('my-cls');

Example: Cell at zero order position in locked side

var cell = grid.getHeaderCell(0, 'left');

cell.addClass('my-cls');