import type { Awaitable } from "./Awaitable";
export declare const asyncMaps: {
    <T, R>(fn: (x: T, i: number) => Awaitable<R>, options?: {
        concurrency?: number;
    }): TransformStream<T, R>;
    <T, R>(fn: (x: T, i: number) => Awaitable<R>): TransformStream<T, R>;
};