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