export declare class MySet {
    private readonly collection;
    constructor();
    has(el: any): boolean;
    values(): any[];
    add(el: any): boolean;
    size(): number;
    remove(el: any): boolean;
    union(otherSet: MySet): Set<any>;
    intersection(otherSet: MySet): Set<any>;
    difference(otherSet: MySet): Set<any>;
    subset(otherSet: MySet): boolean;
}