export declare class LinkedList<T> {
    constructor(data: T);
    data: T;
    prev: LinkedList<T> | undefined;
    next: LinkedList<T> | undefined;
    first(): LinkedList<T>;
    last(): LinkedList<T>;
    nth(n: number): LinkedList<T>;
    get index(): number;
    backwardIter(): Generator<LinkedList<T>, void, unknown>;
    forwardIter(): Generator<LinkedList<T>, void, unknown>;
    static fromArray<U>(itemsData: U[]): LinkedList<U>;
    static fromArrayAfterSorting<U>(itemsData: U[], compareFn: (a: U, b: U) => number): LinkedList<U>;
}