admin | Subtree split of the Filament Admin Panel

private AdminClient getAdminClient(String bootstrapServerConfig) {
        Properties config = new Properties();
        config.put(AdminClientConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServerConfig);
        return AdminClient.create(config);
    }  

@RolesAllowed("ADMIN")
    @GetMapping("/admin")
    public String adminHello() {
        return "Hello Admin";
    }  

@RequestMapping(value = "/admin/x", method = RequestMethod.GET)
    @ResponseBody
    public String sampleAdminPage() {
        return "Hello";
    }