public function addGroup($parent, $child)
    {
        // Find the parent group's dn
        $parentDn = $this->dn($parent);

        $childDn = $this->dn($child);

        if ($parentDn && $childDn) {
            $add['member'] = $childDn;

            // Add the child to the parent group and return the result
            return $this->connection->modAdd($parentDn, $add);
        }

        return false;
    }