/**
* @param string $code
* @return null
*/
public function setCode($code)
{
if (!isset($this->loadedFields['code'])) {
$this->loadProperties();
}
$oldValue = null;
if (array_key_exists('code', $this->loadedValues)) {
$oldValue = $this->loadedValues['code'];
}
if ($oldValue === $code) {
$this->code = $code;
return;
}
return parent::setCode($code);
}
