/**
 * Access the user roles from the request object i.e `req.user.roles`.
 *
 * You can pass an optional property key to the decorator to get it from the user object
 * e.g `@UserRoles('permissions')` will return the `req.user.permissions` instead.
 * In case that the request is missing User object the function will return null
 */
export declare const UserRoles: (...dataOrPipes: (string | import("@nestjs/common").PipeTransform<any, any> | import("@nestjs/common").Type<import("@nestjs/common").PipeTransform<any, any>>)[]) => ParameterDecorator;