@GetMapping("/{id}")
    public ShenyuAdminResult detailSelector(@PathVariable("id") @Valid
                                            @Existed(provider = SelectorMapper.class, message = "selector is not existed") final String id) {
        SelectorVO selectorVO = selectorService.findById(id);
        return ShenyuAdminResult.success(ShenyuResultMessage.DETAIL_SUCCESS, selectorVO);
    }
detail selector.

@param id selector id.
@return {@linkplain ShenyuAdminResult}
shenyu-admin/src/main/java/org/apache/shenyu/admin/controller/SelectorController.java