/**
 * Split a datetime interval at arbitrary `points`, producing consecutive sub-intervals.
 *
 * - `points` need not be sorted — they are sorted internally before splitting.
 * - Points outside `[start, end]` are dropped; they cannot introduce a boundary that isn't
 *   inside the interval.
 * - Points exactly on `start` or `end` are dropped too — they would only produce a
 *   zero-length sub-interval at the edge, which `divideEqually`'s zero-length case is the
 *   deliberate way to express, not `splitAt`'s.
 * - Duplicate points 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
 *   PlainDateTime string, or on invalid input (unparseable start/end, `start > end`).
 *
 * @param start ISO PlainDateTime string for the interval start
 * @param end ISO PlainDateTime string for the interval end
 * @param points array of ISO PlainDateTime strings to split at
 * @returns array of `{ start, end }` records, or `[]` on invalid input
 *
 * @example intervalSplitAtDateTime("2024-01-01T00:00:00", "2024-01-10T00:00:00", ["2024-01-05T00:00:00"]) // [{ start: "2024-01-01T00:00:00", end: "2024-01-05T00:00:00" }, { start: "2024-01-05T00:00:00", end: "2024-01-10T00:00:00" }]
 * @example intervalSplitAtDateTime("2024-01-01T00:00:00", "2024-01-10T00:00:00", []) // [{ start: "2024-01-01T00:00:00", end: "2024-01-10T00:00:00" }]
 * @example intervalSplitAtDateTime("invalid", "2024-01-10T00:00:00", ["2024-01-05T00:00:00"]) // []
 * @example intervalSplitAtDateTime("2024-01-01T00:00:00", "2024-01-10T00:00:00", ["not-a-datetime"]) // []
 */
export declare function intervalSplitAtDateTime(start: string, end: string, points: string[]): Array<{
    start: string;
    end: string;
}>;