export declare class jscron {
    /**
     Cron Format
     -----------
     *    *    *    *    *    *
     |    |    |    |    |    |day of week(0-6)
     |    |    |    |    |month(1-12)
     |    |    |    |day of month(1-31)
     |    |    |hour(0-23)
     |    |minute(0-59)
     |seconds(0-59)

     *    - all the options for that field
     * /2- starting from the first option, every other option
     0    - only use the explicitly provided option
     2,4 - use list of values provided, separated by comma
     */
    static parse(cron: string, startTimeUnix: number, endTimeUnix: number): number[];
    static timeToCron(time: number): string;
    static _findOptions(cron: string): [number[], number[], number[], number[], number[], number[]] | null;
}