/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/
export interface INavigator<T> {
    current(): T | null;
    previous(): T | null;
    first(): T | null;
    last(): T | null;
    next(): T | null;
}
export declare class ArrayNavigator<T> implements INavigator<T> {
    private readonly items;
    protected start: number;
    protected end: number;
    protected index: number;
    constructor(items: readonly T[], start?: number, end?: number, index?: number);
    current(): T | null;
    next(): T | null;
    previous(): T | null;
    first(): T | null;
    last(): T | null;
}