import { ZeniDate } from '../../zeniDayJS';
import { COABalanceTimeFrame } from '../coaBalance/coaBalance';
import { Month } from '../timePeriod';
export declare function addPeriod(date: ZeniDate, _firstMonthOfFY: Month, numberOfPeriods: number, timeframe: Exclude<COABalanceTimeFrame, 'free_range'>): import("dayjs").Dayjs;
export declare function subtractPeriod(date: ZeniDate, _firstMonthOfFY: Month, numberOfPeriods: number, timeframe: Exclude<COABalanceTimeFrame, 'free_range'>): import("dayjs").Dayjs;