How to document a callback using DarkaOnLine / L5-Swagger in Laravel 5.8

I need to document a callback, I tried something like this but it doesn't work:

   /**
     * @OA\Post(
     *      path="/myurl-service",
     *      operationId="Id",
     *      tags={"Services"},
     *      summary="Summary",
     *      description="Desc",
     *      security={
     *           {"bearerAuth": {}}
     *       },
     *      @OA\RequestBody(
     *          required=true,
     *          @OA\JsonContent(ref="#/components/schemas/Request")
     *      ),
     *      callbacks={
     *          "Notification": {
     *              "{$request.body#/notification_url}":
     *              @OA\Post(
     *                  @OA\RequestBody(
     *                      required=true
     *                  ),
     *                  @OA\Response(
     *                      response=200,
     *                      description="Successful operation"
     *                  ),
     *              ),
     *          }
     *      }
     *     )
     */

Has anyone documented this and can give me a hand?

Thanks in advance.

via Chebli Mohamed