export default class CountClosing<T> implements Generator<T, void> {
    private _closed;
    private readonly _iterator;
    private readonly _throwError;
    constructor(iterable: Iterable<T>, throwError?: boolean);
    readonly closed: number;
    next(): IteratorResult<T, void>;
    return(): {
        done: true;
        value: undefined;
    };
    throw(err: any): IteratorResult<T, void>;
    [Symbol.iterator](): Generator<T, void>;
}