export declare class PushAsyncIterator<A> implements AsyncIterator<A>, AsyncIterable<A> {
    private pullNext?;
    private eof;
    private pendingError?;
    id: number;
    private pushed;
    private resolve;
    private reject;
    constructor(pullNext?: (() => (A | undefined)) | undefined);
    push(item?: A): void;
    end(): void;
    error(error: Error): void;
    [Symbol.asyncIterator](): this;
    next(): Promise<IteratorResult<A>>;
    private wakeup;
    private callResolve;
    private callReject;
    toString(): string;
}