/**
 * Return the portion(s) of interval A not covered by interval B.
 *
 * - Uses `Temporal.PlainTime.compare` for comparison.
 * - Returns `[]` when B fully covers A.
 * - Returns `[{ start, end }]` when B overlaps one edge of A (or equals A).
 * - Returns `[{ start, end }, { start, end }]` when B is fully inside A with gaps on both sides.
 * - Returns `[]` if either interval is invalid (`start > end`).
 * - Returns `[]` on invalid input (wrong type, malformed strings).
 *
 * @param aStart ISO 8601 time string for the first interval start
 * @param aEnd ISO 8601 time string for the first interval end
 * @param bStart ISO 8601 time string for the second interval start
 * @param bEnd ISO 8601 time string for the second interval end
 * @returns array of `{ start, end }` records representing A minus B, or `[]` on invalid input
 *
 * @example intervalDifferenceTime("09:00:00", "17:00:00", "12:00:00", "13:00:00") // [{ start: "09:00:00", end: "11:59:59" }, { start: "13:00:01", end: "17:00:00" }]
 * @example intervalDifferenceTime("09:00:00", "17:00:00", "09:00:00", "17:00:00") // []
 * @example intervalDifferenceTime("09:00:00", "17:00:00", "12:00:00", "17:00:00") // [{ start: "09:00:00", end: "11:59:59" }]
 * @example intervalDifferenceTime("invalid", "17:00:00", "12:00:00", "13:00:00") // []
 */
export declare function intervalDifferenceTime(aStart: string, aEnd: string, bStart: string, bEnd: string): Array<{
    start: string;
    end: string;
}>;