/**
* Constructor
*
* @param mixed $model
* @param array $identifiers
*/
public function __construct($model, array $identifiers = [])
{
parent::__construct($model);
$this->identifiers = $identifiers;
}
/**
* Constructor
*
* @param mixed $model
* @param array $changes
*/
public function __construct($model, array $changes = [])
{
parent::__construct($model);
$this->changes = $changes;
}