/**
* Write a Row to the File. The Fieldset of the Row must match the
*
* @param Row $row
*
* @throws Exception
*/
public function writeRow(Row $row)
{
if (!$row->isValid()) {
throw new Exception('Cant add invalid row');
}
if ($row->getFieldset() != $this->fieldset) {
throw new Exception('Cant add row with different fieldset');
}
$this->data .= $row->render() . "\r\n";
}