public function getRolesByPrivilege($privilege)
    {
        $roles = array();

        if ($this->acl) {
            foreach ($this->acl->getRoles() as $role) {
                if ($this->acl->isAllowed($role, null, $privilege)) {
                    //Do not translate, only make first one uppercase
                    $roles[$role] = ucfirst($role);
                }
            }
        }

        return $roles;
    }