apollo-adminservice/src/main/java/com/ctrip/framework/apollo/adminservice/controller/ReleaseController.java/ReleaseController/getLatest
class ReleaseController:  @GetMapping("/apps/{appId}/clusters/{clusterName}/namespaces/{namespaceName}/releases/latest")
  public ReleaseDTO getLatest(@PathVariable("appId") String appId,
                              @PathVariable("clusterName") String clusterName,
                              @PathVariable("namespaceName") String namespaceName) {
    Release release = releaseService.findLatestActiveRelease(appId, clusterName, namespaceName);
    return BeanUtils.transform(ReleaseDTO.class, release);
  }