Category::getAccess

private function getAccess($permissions): string
{
	$access = null;
	array_walk_recursive($permissions, static function ($item) use (&$access) {
		if ($access === null)
		{
			$access = $item;
		}
		elseif ($access !== false && $access !== $item)
		{
			$access = false;
		}
	});

	return (
	!in_array($access, [BX_CRM_PERM_ALL, BX_CRM_PERM_SELF, BX_CRM_PERM_NONE], true)
		? 'C'
		: $access
	);
}