import type { Args, Keyed } from "../types/index.js";
/**
 * Type guard: returns `true` if `args` is already wrapped in `Keyed<T>`.
 */
export declare function isKeyed<T>(args: Args<T>): args is Keyed<T>;
/**
 * Normalizes raw args into `Keyed<T>`.
 * If `args` is already `Keyed`, it passes through unchanged.
 * Otherwise wraps with `{ value: args, key: serializeFn(args) }`.
 */
export declare function toKeyed<T>(args: Args<T>, serializeFn?: (value: T) => string): Keyed<T>;