@GetMapping("/{id}")
    @RequiresPermissions("system:namespace:edit")
    public ShenyuAdminResult detailPlugin(@PathVariable("id")
                                          @Existed(message = "namespaceId is not existed",
                                                  provider = NamespaceMapper.class) final String namespaceId) {
        NamespaceVO namespaceVO = namespaceService.findByNamespaceId(namespaceId);
        return ShenyuAdminResult.success(ShenyuResultMessage.DETAIL_SUCCESS, namespaceVO);
    }
detail namespace.

@param namespaceId namespace id.
@return {@linkplain ShenyuAdminResult}
shenyu-admin/src/main/java/org/apache/shenyu/admin/controller/NamespaceController.java