apollo-biz/src/main/java/com/ctrip/framework/apollo/biz/service/ReleaseService.java/ReleaseService/findLatestActiveRelease
class ReleaseService:  public Release findLatestActiveRelease(Namespace namespace) {
    return findLatestActiveRelease(namespace.getAppId(),
                                   namespace.getClusterName(), namespace.getNamespaceName());

  }