Swagger-php: IRequired @OA\Info() not found

[rhettli]

I fllow the manue :
composer require zircote/swagger-php
composer global require zircote/swagger-php

And My code:
public function getJSON() { $dir = dirname($_SERVER['DOCUMENT_ROOT']) . '\application'; // echo $dir; $openapi =\OpenApi\scan($dir); return $openapi->toYaml(); }

But it throw error:
Required @OA\Info() not found

My run env: thinkphp5.1

Can you fix the bug,thx.

[bfanger]

swagger-php couldn't find a @OA\Info annotation in any of the *.php files in$dir.

Add the missing annotation(s) and try again.