import type { VerifiedFetchInit } from '../index.js';
/**
 * Converts an async iterator of Uint8Array bytes to a stream and returns the first chunk of bytes
 */
export declare function getStreamFromAsyncIterable(iterator: AsyncIterable<Uint8Array>, options?: Pick<VerifiedFetchInit, 'onProgress' | 'signal'>): Promise<{
    stream: ReadableStream<Uint8Array>;
    firstChunk: Uint8Array;
}>;
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