public function expand(string $acl_string = null)
{
// In case there is no ID list, return empty array (=> no ACL set)
public function expand(string $acl_string = null)
{
// In case there is no ID list, return empty array (=> no ACL set)
// The item is a allowed ACL character
} elseif (in_array($item, [Group::FOLLOWERS, Group::MUTUALS])) {
$item = '<' . $item . '>';
// The item is a allowed ACL character
} elseif (in_array($item, [Group::FOLLOWERS, Group::MUTUALS])) {
$item = '<' . $item . '>';