[Plugin: User Access Manager] Show admin hint text [L] to subscribers?

I think, this should be the code to work on/change (line 699):

public function userIsAdmin($userId)
    {
        $role = $this->_getUserRole($userId);

        if ($role == 'administrator'
            || is_super_admin($userId)
        ) {
            return true;
        }

        return false;
    }