/**
* @param string $parent
* @return null
*/
public function setParent($parent = '0')
{
if (!isset($this->loadedFields['parent'])) {
$this->loadProperties();
}
$oldValue = null;
if (array_key_exists('parent', $this->loadedValues)) {
$oldValue = $this->loadedValues['parent'];
}
if ($oldValue === $parent) {
$this->parent = $parent;
return;
}
return parent::setParent($parent);
}
