import type { Transform } from 'style-dictionary/types';
/**
 * @description converts duration tokens to css duration string
 * @type value transformer — [StyleDictionary.ValueTransform](https://github.com/amzn/style-dictionary/blob/main/types/Transform.d.ts)
 * @matcher matches all tokens of $type `duration`
 * @transformer returns a css duration
 * @note W3C DTCG format: { value: number, unit: "ms" | "s" }
 */
export declare const durationToCss: Transform;