import { Slot } from "./Slot";
export declare class SlotList {
    static NIL: SlotList;
    head: Slot;
    tail: SlotList;
    nonEmpty: boolean;
    constructor(head: Slot, tail?: SlotList);
    readonly length: number;
    prepend(slot: Slot): SlotList;
    append(slot: Slot): SlotList;
    insertWithPriority(slot: Slot): SlotList;
    filterNot(listener: Function): SlotList;
    contains(listener: Function): boolean;
    find(listener: Function): Slot;
    toString(): string;
}