import { ITimelineItem } from "./item";
export interface IItemsIterator {
    readonly items: ITimelineItem[];
    setItems(items: ITimelineItem[]): void;
    isEmpty(): boolean;
    forEach(handler: (item: ITimelineItem, parent: ITimelineItem | null, onlyVisible?: boolean) => void): void;
    getFirstItem(onlyExpanded: boolean): ITimelineItem;
    getLastItem(onlyExpanded: boolean): ITimelineItem;
}