Grid/Source/Source.php
public function prepareRow($row)
    {
        if (is_callable($this->prepareRowCallback)) {
            return call_user_func($this->prepareRowCallback, $row);
        }

        return $row;
    }
public function prepareRow($row)
    {
        if (is_callable($this->prepareRowCallback)) {
            return call_user_func($this->prepareRowCallback, $row);
        }

        return $row;
    }
@param \APY\DataGridBundle\Grid\Row $row

@return \APY\DataGridBundle\Grid\Row|null