Php NelmioAPI文档：文档中说我的json对象是数组，如何修复？

我正在使用NelmioAPI文档，使用FOSRestBundle和JMSSerializer为我的RESTAPI生成文档。生成的文档说我的json对象实际上是数组。我如何让文档说我的对象是对象

我知道，在php中，这些字段实际上是键值关联数组，但在实际的json中，它们是对象，我希望我的文档能够反映这一点

这是我的密码 实体：

控制器：

/**
 * Resource describing the Facility object
 *
 * @ApiDoc(
 *   resource = true,
 *   resourceDescription="Operations on facilities.",
 *   description = "Facility object",
 *   output = "Company\Bundle\RestApiBundle\Entity\Facility",
 *   statusCodes = {
 *     200 = "Returned when successful",
 *     404 = "Returned when the resource is not found"
 *   }
 * )
 *
 * @param $id
 * @return \Symfony\Component\HttpFoundation\Response
 *
 * @Method("GET")
 * @Route("/{id}", name = "api_facility_get")
 */
public function getFacilityAction($id)
{

/**
 * Resource describing the Facility object
 *
 * @ApiDoc(
 *   resource = true,
 *   resourceDescription="Operations on facilities.",
 *   description = "Facility object",
 *   output = "Company\Bundle\RestApiBundle\Entity\Facility",
 *   statusCodes = {
 *     200 = "Returned when successful",
 *     404 = "Returned when the resource is not found"
 *   }
 * )
 *
 * @param $id
 * @return \Symfony\Component\HttpFoundation\Response
 *
 * @Method("GET")
 * @Route("/{id}", name = "api_facility_get")
 */
public function getFacilityAction($id)
{