declare module 'linked-list' {
  export default LinkedList;

  export interface ListItem {
    next: ListItem;

    prev: ListItem;

    list: LinkedList | null;

    append (item: ListItem): ListItem;

    detach (): boolean;

    prepend (item: ListItem): ListItem;
  }

  class LinkedList {

    head: ListItem;
    tail: ListItem;

    /** Creates a new List: A linked list is a bit like an Array,
     * but knows nothing about how many items are in it, and
     * knows only about its first (`head`) and last (`tail`)
     * items.  Each item (e.g. `head`, `tail`, &c.) knows which
     * item comes before or after it (its more like the
     * implementation of the DOM in JavaScript).
     * @param [items]
     */
    constructor (...items: ListItem[]);

    static from (items: ListItem[]): LinkedList;

    static of (...items: ListItem[]): LinkedList;

    append (item: ListItem): ListItem;

    prepend (item: ListItem): ListItem;

    toArray (): any[];

  }

  namespace LinkedList {
    class Item implements ListItem {
      list: LinkedList | null;
      next: ListItem;
      prev: ListItem;

      constructor ();

      append (item: ListItem): ListItem;

      detach (): boolean;

      prepend (item: ListItem): ListItem;

    }
  }

}