import { TransformerFunction } from './TransformerFunction';
export type Timestamp = `${string}:${string}:${string}.${string}`;
export declare const TIMESTAMP_DEFAULT = "00:00:00.000";
/**
 * Renders numeric seconds value as a timestamp
 * @param timeInSeconds seconds as a numeric value, can contain a fractional part
 * @returns timestamp string
 * @returns defaults to '00:00:00.000' if value is undefined or null
 */
export declare const formatSecondsToTimestamp: TransformerFunction<number, Timestamp>;
/**
 * Takes a timestamp and turns it into seconds
 * @param timestamp string in the format of a timestamp
 * @returns seconds
 */
export declare const timestampToSeconds: TransformerFunction<Timestamp, number>;
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