import { IClip, ITransitionClip } from '../types';
import { default as Timeline } from '../timeline';
type GroupElement = IClip | ITransitionClip;
export declare const groupTrackItems: (data: {
    trackItemIds: string[];
    transitionsMap: Record<string, ITransitionClip>;
    trackItemsMap: Record<string, IClip>;
}) => GroupElement[][];
export declare const getPrevTransitionDuration: (timeline: Timeline, id: string) => number;
export {};