User::isAdmin

static function isAdmin($userId = 0)
{
	if(!static::includeModule())
	{
		return false;
	}

	if(!$userId)
	{
		$userId = \Bitrix\Recyclebin\Internals\User::getCurrentUserId();
	}

	if($userId)
	{
		static $cache = array();

		if(!isset($cache[$userId]))
		{
			$cache[$userId] = (boolean) \CBitrix24::isPortalAdmin($userId);
		}

		return $cache[$userId];
	}

	return false;
}