import type { ContextOptions, DateArg } from "./types.js";
/**
* The {@link lastDayOfDecade} function options.
*/
export interface LastDayOfDecadeOptions<DateType extends Date = Date>
extends ContextOptions<DateType> {}
/**
* @name lastDayOfDecade
* @category Decade Helpers
* @summary Return the last day of a decade for the given date.
*
* @description
* Return the last day of a decade for the given date.
*
* @typeParam DateType - The `Date` type, the function operates on. Gets inferred from passed arguments. Allows using extensions like [`UTCDate`](https://github.com/date-fns/utc).
* @typeParam ResultDate - The result `Date` type; inferred from arguments or specified by context.
*
* @param date - The original date
* @param options - The options
*
* @returns The last day of a decade
*
* @example
* // The last day of a decade for 21 December 2012 21:12:00:
* const result = lastDayOfDecade(new Date(2012, 11, 21, 21, 12, 00))
* //=> Wed Dec 31 2019 00:00:00
*/
export declare function lastDayOfDecade<
DateType extends Date,
ResultDate extends Date = DateType,
>(
date: DateArg<DateType>,
options?: LastDayOfDecadeOptions<ResultDate> | undefined,
): ResultDate;