export declare class LinkNode<T> {
    content: T;
    next: LinkNode<T> | null;
    pre: LinkNode<T> | null;
    constructor(content: T);
}
export declare class Link<T> {
    private readonly sort;
    first: LinkNode<T>;
    last: LinkNode<T>;
    length: number;
    constructor(sort: (a: T, b: T) => number);
    findNodeByContent(filter: (d: T) => boolean): LinkNode<T> | undefined;
    private insertNode;
    shiftNode(content: T): LinkNode<T> | undefined;
    pushNode(content: T): LinkNode<T> | undefined;
    removeNode(node: LinkNode<T>): void;
    forEach(func: (content: T, index: number) => void, thisObj?: any): void;
    forEachReverse(func: (content: T, index: number) => void, thisObj?: any): void;
    getNodeByIndex(index: number): LinkNode<T> | null;
}