/**
 * Parses a time string (e.g. "1h", "30m", "1h30m", "2h15m10s", "100ms")
 * into milliseconds. Throws an error if the format is invalid.
 *
 * Supported units:
 * - h: hours
 * - m: minutes
 * - s: seconds
 * - ms: milliseconds
 *
 * @param value A string or number representing a duration.
 * @returns The duration in milliseconds.
 */
export declare function parseExpiresIn(value: string | number): number;