/**
 * @param time Date/String/Number
 * @param fmt 'yyyy-MM-dd hh:mm:ss'  'yyyy-MM-dd'
 * @description formatDate('2020/9/11')
 * @returns '2020-09-11 12:03:11' '2020-09-11'
 */
export declare function formatDate(time: string | number | Date, fmt: string): string;