class RelationshipFieldAccess

class RelationshipFieldAccess implements AccessInterface {
    
    /**
     * The route requirement key for this access check.
     *
     * @var string
     */
    const ROUTE_REQUIREMENT_KEY = '_jsonapi_relationship_field_access';
    
    /**
     * The JSON:API entity access checker.
     *
     * @var \Drupal\jsonapi\Access\EntityAccessChecker
     */
    protected $entityAccessChecker;
    
    /**
     * RelationshipFieldAccess constructor.
     *
     * @param \Drupal\jsonapi\Access\EntityAccessChecker $entity_access_checker
     *   The JSON:API entity access checker.
     */
    public function __construct(EntityAccessChecker $entity_access_checker) {
        $this->entityAccessChecker = $entity_access_checker;
    }
    
    /**
     * Checks access to the relationship field on the given route.
     *
     * @param \Symfony\Component\HttpFoundation\Request $request
     *   The incoming HTTP request object.
     * @param \Symfony\Component\Routing\Route $route
     *   The route to check against.
     * @param \Drupal\Core\Session\AccountInterface $account
     *   The currently logged in account.
     *
     * @return \Drupal\Core\Access\AccessResultInterface
     *   The access result.
     */
    public function access(Request $request, Route $route, AccountInterface $account) {
        @trigger_error(sprintf("The %s access check is deprecated in drupal:9.2.0 and is removed from drupal:10.0.0. There is no replacement. JSON:API's route access checks are internal. See https://www.drupal.org/node/3194641.", static::ROUTE_REQUIREMENT_KEY), E_USER_DEPRECATED);
        $relationship_route_access_checker = \Drupal::service('access_check.jsonapi.relationship_route_access');
        assert($relationship_route_access_checker instanceof RelationshipRouteAccessCheck);
        $access_result = $relationship_route_access_checker->access($route, RouteMatch::createFromRequest($request), $account);
        assert($access_result instanceof AccessResultReasonInterface);
        if (!$access_result->isAllowed() && $request->isMethodCacheable()) {
            throw new CacheableAccessDeniedHttpException(CacheableMetadata::createFromObject($access_result), $access_result->getReason());
        }
        return $access_result;
    }

}