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