import { AbstractIterator } from "./AbstractIterator.js";
/** Iterable that pulls values from a source iterable. */
export declare class ThroughIterator<T, R, N> extends AbstractIterator<T, R, N> implements Iterator<T, R, N>, Iterable<T, R, N> {
    private readonly _source;
    constructor(iterator: Iterator<T, R, N>);
    next(value: N): IteratorResult<T, R>;
    throw(thrown: unknown): IteratorResult<T, R>;
    return(value: R): IteratorResult<T, R>;
}