/**
 * Split a zoned interval at arbitrary `points`, producing consecutive sub-intervals.
 *
 * - `points` need not be sorted — they are sorted internally (by instant) before splitting.
 * - Comparison and boundary placement use the instant each point represents, so points may
 *   carry a different time zone than `start`/`end`.
 * - Points outside `[start, end]` are dropped; they cannot introduce a boundary that isn't
 *   inside the interval.
 * - Points on the same instant as `start` or `end` are dropped too — they would only produce a
 *   zero-length sub-interval at the edge.
 * - Duplicate points (same instant) collapse to a single boundary.
 * - Returns `[{ start, end }]` (the whole interval, unsplit) when no valid in-range point remains.
 * - Returns `[]` when `points` is not an array, when any element is not a valid ISO
 *   ZonedDateTime string, or on invalid input (unparseable start/end, `start > end`,
 *   leap-second strings).
 * - Accepts GMT calendar-annotated zoned strings (as produced by `convertZonedToCalendar`) as
 *   well as bare ISO ones — E7 (issue #152) — but **rejects a mismatched set**: `start`, `end`
 *   and every element of `points` must name the same calendar system (E7's D4-zoned), since the
 *   returned sub-intervals are values the caller reads back as datetimes and an array of
 *   differently-tagged records would be unreadable as a set. A mismatch returns `[]`.
 * - Output boundaries are re-derived in the resolved calendar via `formatZonedInCalendar`, never
 *   copied from an input string (E7's D7-zoned).
 *
 * @param start ISO 8601 zoned datetime string for the interval start
 * @param end ISO 8601 zoned datetime string for the interval end
 * @param points array of ISO 8601 zoned datetime strings to split at
 * @returns array of `{ start, end }` records, or `[]` on invalid input
 *
 * @example intervalSplitAtZoned("2024-01-01T00:00:00+00:00[UTC]", "2024-01-10T00:00:00+00:00[UTC]", ["2024-01-05T00:00:00+00:00[UTC]"]) // [{ start: "2024-01-01T00:00:00+00:00[UTC]", end: "2024-01-05T00:00:00+00:00[UTC]" }, { start: "2024-01-05T00:00:00+00:00[UTC]", end: "2024-01-10T00:00:00+00:00[UTC]" }]
 * @example intervalSplitAtZoned("2024-01-01T00:00:00+00:00[UTC]", "2024-01-10T00:00:00+00:00[UTC]", []) // [{ start: "2024-01-01T00:00:00+00:00[UTC]", end: "2024-01-10T00:00:00+00:00[UTC]" }]
 * @example intervalSplitAtZoned("invalid", "2024-01-10T00:00:00+00:00[UTC]", ["2024-01-05T00:00:00+00:00[UTC]"]) // []
 */
export declare function intervalSplitAtZoned(start: string, end: string, points: string[]): Array<{
    start: string;
    end: string;
}>;