/**
 * Return the symmetric difference of two time intervals — time covered by exactly one interval.
 *
 * - Uses `Temporal.PlainTime.compare` for comparison.
 * - Returns `[]` when intervals are identical or both invalid.
 * - Returns `[{ start, end }]` when one interval fully contains the other.
 * - Returns `[{ start, end }, { start, end }]` when intervals partially overlap.
 * - 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 the symmetric difference, or `[]` on invalid input
 *
 * @example intervalXorTime("09:00:00", "12:00:00", "11:00:00", "17:00:00") // [{ start: "09:00:00", end: "10:59:59" }, { start: "12:00:01", end: "17:00:00" }]
 * @example intervalXorTime("09:00:00", "17:00:00", "11:00:00", "12:00:00") // [{ start: "09:00:00", end: "10:59:59" }, { start: "12:00:01", end: "17:00:00" }]
 * @example intervalXorTime("09:00:00", "17:00:00", "09:00:00", "17:00:00") // []
 * @example intervalXorTime("09:00:00", "12:00:00", "13:00:00", "17:00:00") // [{ start: "09:00:00", end: "12:00:00" }, { start: "13:00:00", end: "17:00:00" }]
 * @example intervalXorTime("invalid", "12:00:00", "13:00:00", "17:00:00") // []
 */
export declare function intervalXorTime(aStart: string, aEnd: string, bStart: string, bEnd: string): Array<{
    start: string;
    end: string;
}>;