/**
 * @license
 *-------------------------------------------------------------------------------------------
 * Copyright © 2026 Progress Software Corporation. All rights reserved.
 * Licensed under commercial license. See LICENSE.md in the package root for more information
 *-------------------------------------------------------------------------------------------
 */
import { TimelineEventProps } from './Timeline.js';
/**
 * Sort the events list based on event date.
 */
export declare const sortEventList: (eventList: TimelineEventProps[]) => TimelineEventProps[];
/**
 * @hidden
 */
export interface yearFlagProps {
    yearFlag?: number;
}
/**
 * @hidden
 */
export declare const addYearsFlags: (eventsData: TimelineEventProps[]) => (TimelineEventProps | yearFlagProps)[];