/**
 * Return true when the Unix timestamp is between start and end (inclusive by default).
 *
 * - Uses Temporal.Instant.compare for comparison.
 * - Returns false if start > end or inputs are invalid.
 * - Use options.inclusiveStart/inclusiveEnd to control boundaries.
 *
 * @param value Unix timestamp to check
 * @param start Unix timestamp for range start
 * @param end Unix timestamp for range end
 * @param options optional: epochUnit ("seconds" | "milliseconds"), timeZone (IANA), inclusiveStart (boolean), inclusiveEnd (boolean)
 * @returns boolean indicating whether value is between start and end
 *
 * @example isBetweenUnix(1705000000000, 1704000000000, 1706000000000) // true
 * @example isBetweenUnix(1705000000, 1704000000, 1706000000, { epochUnit: "seconds" }) // true
 * @example isBetweenUnix(1703000000000, 1704000000000, 1706000000000) // false
 */
export declare function isBetweenUnix(value: number, start: number, end: number, options?: {
    epochUnit?: "seconds" | "milliseconds";
    timeZone?: string;
    inclusiveStart?: boolean;
    inclusiveEnd?: boolean;
}): boolean;