/**
 * Doubly linked list
 */
export declare class DoublyLinkedList<T> implements Iterable<T> {
    private head;
    private tail;
    constructor(data?: Iterable<T>);
    /**
     * First node
     */
    getHead(): T;
    /**
     * Last node
     */
    getTail(): T;
    /**
     * Insert a node at the end of the list
     * @param item
     */
    append(item: T): void;
    /**
     * Insert a node at the beginning of the list
     * @param item
     */
    prepend(item: T): void;
    /**
     * Remove a node
     */
    delete(item: T): void;
    /**
     * Delete a node and nodes after it
     */
    deleteAfter(item: T): any;
    /**
     * Delete the first node
     */
    deleteHead(): T;
    /**
     * Delete the last node
     */
    deleteTail(): T;
    /**
     * Iterate through the list
     */
    [Symbol.iterator](): Iterator<T>;
}