public function getAssignment($roleName, $userId)
    {
        return isset($this->assignments[$userId][$roleName]) ? $this->assignments[$userId][$roleName] : null;
    }
public function getAssignment($roleName, $userId)
    {
        return isset($this->assignments[$userId][$roleName]) ? $this->assignments[$userId][$roleName] : null;
    }
public function getAssignment ( $ roleName , $ userId ) { return isset ( $ this -> assignments [ $ userId ] [ $ roleName ] ) ? $ this -> assignments [ $ userId ] [ $ roleName ] : null ; }
{@inheritdoc}
{