public Mono<Set<AdminPermission>> queryPermissions(@NotNull Long adminId) {
        try {
            Validator.notNull(adminId, "adminId");
        } catch (ResponseException e) {
            return Mono.error(e);
        }
        return adminService.queryRoleIdsByAdminId(adminId)
                .flatMap(this::queryPermissions);
    }
@param adminService is lazy because: AdminService -> AdminRoleService -> AdminService
turms-service/src/main/java/im/turms/service/domain/admin/service/AdminRoleService.java