declare class IterableWMapFilter<T> {
    vals: T[];
    operations: Iterator<T>[];
    constructor(intialVals: T[]);
    add(v: any): void;
    map(fn: (val: number) => any): IterableWMapFilter<T>;
    filter(fn: (val: number) => any): IterableWMapFilter<T>;
    private next;
    [Symbol.iterator](): this;
}
declare const v: IterableWMapFilter<number>;
declare const z: IterableWMapFilter<number>;