import { Input } from "./async";
import { QueueMicrotask } from "./microtask";
export interface MergeOptions {
    queueMicrotask?: QueueMicrotask;
    reuseInFlight?: boolean;
}
export interface AsyncIteratorSetResult<T> {
    done: boolean;
    value?: T;
    initialIteration: symbol;
    resolvedIteration?: symbol;
    iterator: AsyncIterator<T>;
    promise?: unknown;
}
export declare type LaneInput<T> = Input<Input<T>>;
export declare function merge<T>(source: LaneInput<T>, options?: MergeOptions): AsyncIterable<(T | undefined)[]>;