/**
 * Marks a class as the application's `IGroupRoleResolver` (exactly one per app).
 * Discovered at bootstrap and registered in `GroupRoleResolverRegistry`.
 *
 * Applies `@Injectable()` with default (singleton) scope. Do **not** add `@Injectable()`
 * on the same class — a second decorator can override scope (e.g. `REQUEST`) and break
 * bootstrap, which resolves one instance at application startup.
 */
export declare function GroupRoleResolver(): ClassDecorator;