Grid/Column/Column.php
public function setOrder($order)
    {
        if ($order !== null) {
            $this->order = $order;
            $this->isSorted = true;
        }

        return $this;
    }
public function setOrder($order)
    {
        if ($order !== null) {
            $this->order = $order;
            $this->isSorted = true;
        }

        return $this;
    }
set column order.

@param string $order asc|desc

@return \APY\DataGridBundle\Grid\Column\Column