/**
*
*
* @param boolean $todo_for_empty_elements A constant, one of: QUICKBOOKS_XML_XML_COMPRESS, QUICKBOOKS_XML_XML_DROP, QUICKBOOKS_XML_XML_PRESERVE
* @param string $indent
* @param string $root
* @return string
*/
public function asQBXML($request, $todo_for_empty_elements = QUICKBOOKS_OBJECT_XML_DROP, $indent = "\t", $root = null)
{
$this->_cleanup();
return parent::asQBXML($request, $todo_for_empty_elements, $indent, $root);
}
