/**
* Gets the instance of the Security class.
*
* @param callable| Closure $callback
* @return object Instance of Security
*/
protected function create(Closure $callback = null)
{
if (self::$instance === null) {
self::$instance = new self();
}
if ($callback instanceof Closure) {
return $callback(self::$instance);
}
return self::$instance;
}
