PaymentDocument::output

public function output($level=0)
{
	$fields = $this->getFieldValues();
	$xml = parent::outputXml($fields, $level);

	foreach ($fields as $name=>$value)
	{
		if(is_array($value))
		{
			switch ($name)
			{
				case 'CASH_BOX_CHECKS':
					$xml .= $this->outputXmlCashBoxChecks($level+0, $name, array($value));
					break;
			}
		}
	}

	return $xml;
}