public function computer(array $attributes = [])
    {
        $model = $this->schema->computerModel();

        return (new $model($attributes, $this->query))
            ->setAttribute($this->schema->objectClass(), [
                $this->schema->top(),
                $this->schema->person(),
                $this->schema->organizationalPerson(),
                $this->schema->user(),
                $this->schema->computer(),
            ]);
    }