export default class MultiMap {
    readonly keys: any;
    readonly values: any;
    readonly sizes: any;
    constructor();
    put(key: any, element: any): void;
    get(key: any): any;
    forEach(callback?: (key: any, value: any) => void): void;
    isEmpty(): boolean;
    size(): any;
    max(): any;
    min(): any;
}