/**
 * Checks leap year using Gregorian rules.
 *
 * @param year - Input year value.
 * @param nsYear - If true, input is Nanakshahi year; otherwise Gregorian year.
 * @returns True for leap year, false otherwise.
 * @example leapYear(555)
 * @internal
 */
declare const leapYear: (year: number, nsYear?: boolean) => boolean;
export default leapYear;