/**
* create a printable representation of the object as:
* ClassName[property=value, property=value]
* @ignore
* @return string
*/
public function __toString()
{
$output = Util::attributesToString($this->_attributes);
if (isset($this->_creditCardVerification)) {
$output .= sprintf('%s', $this->_creditCardVerification);
}
return __CLASS__ . '[' . $output . ']';
}