/**
 * Returns the zoned datetime string rounded/truncated to second precision.
 *
 * - Removes millisecond precision.
 * - Returns "" for invalid input.
 *
 * @param value ISO 8601 zoned datetime string
 * @returns Zoned datetime string without milliseconds or "" for invalid
 *
 * @example chopZonedMilliseconds("2024-02-29T14:30:45.123-05:00[America/New_York]") // "2024-02-29T14:30:45-05:00[America/New_York]"
 * @example chopZonedMilliseconds("invalid") // ""
 */
export declare function chopZonedMilliseconds(value: string): string;