code/services/LDAPService.php
public function getLDAPGroupMembers($dn)
    {
        $groupObj = Group::get()->filter('DN', $dn)->first();
        $groupData = $this->getGroupByGUID($groupObj->GUID);
        $members = !empty($groupData['member']) ? $groupData['member'] : [];
        // If a user belongs to a single group, this comes through as a string.
        // Normalise to a array so it's consistent.
        if ($members && is_string($members)) {
            $members = [$members];
        }

        return $members;
    }
public function getLDAPGroupMembers($dn)
    {
        $groupObj = Group::get()->filter('DN', $dn)->first();
        $groupData = $this->getGroupByGUID($groupObj->GUID);
        $members = !empty($groupData['member']) ? $groupData['member'] : [];
        // If a user belongs to a single group, this comes through as a string.
        // Normalise to a array so it's consistent.
        if ($members && is_string($members)) {
            $members = [$members];
        }

        return $members;
    }
Given a group DN, get the group membership data in LDAP.

@param string $dn
@return array