/**
* Swap two columns
* @param int $col1
* @param int $col2
*/
public function swapCol($col1, $col2)
{
parent::swapCol($col1, $col2);
$tmpC1 = $this->header[$col1];
$this->header[$col1] = $this->header[$col2];
$this->header[$col2] = $tmpC1;
}
