export declare class CronValidators {
    /**
     * Validates if the given minute is within the cron range of 0 to 59.
     * @param {number} minute - The minute value to validate.
     * @throws Will throw an error if the minute is not within the range of 0 to 59.
     */
    static validateMinute(minute: number): void;
    /**
     * Validates if the given hour is within the cron range of 0 to 23.
     * @param {number} hour - The hour value to validate.
     * @throws Will throw an error if the hour is not within the range of 0 to 23.
     */
    static validateHour(hour: number): void;
    /**
     * Validates if the given day of the month is within the cron range of 1 to 31.
     * @param {number} day - The day of the month to validate.
     * @throws Will throw an error if the day is not within the range of 1 to 31.
     */
    static validateDayOfMonth(day: number): void;
    /**
     * Validates if the given month is within the cron range of 1 to 12.
     * @param {number} month - The month value to validate.
     * @throws Will throw an error if the month is not within the range of 1 to 12.
     */
    static validateMonth(month: number): void;
    /**
     * Validates if the given day of the week is within the cron range of 0 (Sunday) to 6 (Saturday).
     * @param {number} day - The day of the week to validate.
     * @throws Will throw an error if the day is not within the range of 0 to 6.
     */
    static validateDayOfWeek(day: number): void;
    /**
     * Validates the format of a cron time string.
     * @param {string} time - The time string to validate in HH:MM format.
     * @throws Will throw an error if the time format does not match HH:MM.
     */
    static validateTime(time: string): void;
    /**
     * Validates if the given time unit is a valid cron time unit.
     * @param {string} unit - The time unit to validate (e.g., 'minute', 'hour', etc.).
     * @throws Will throw an error if the unit is not a valid cron time unit.
     */
    static validateTimeUnit(unit: string): void;
}