public void getContainers(Context ctx) {
    ctx.json(
        OkResponse.of(
            InternalContainers.getMetadataList().stream()
                .map(ContainerMetadata::getName)
                .collect(Collectors.toList())));
  }
check if optimizerGroup can be deleted url = /optimize/containers/get
amoro-ams/src/main/java/org/apache/amoro/server/dashboard/controller/OptimizerGroupController.java