/// <reference types="node" />
import { Stream } from "stream";
/**
 * Returns a collectionId and partitionKey from a provided state key. If the input is not in the expected format,
 * undefined is returned.
 *
 * Only the following inputs are acceptable:
 *  - "partitionKey"
 *  - "@collection/partitionKey"
 *
 * @param inputKey A state key in the format @collectionId/partitionKey
 */
export declare function getCollectionInfo(key: string): {
    collectionId?: string;
    partitionKey: string;
};
/**
 * Converts a readable stream to a string. Stores coverted data in chunks,
 * and on completion joins chunks together into a single string.
 * @param readableStream input to be converted to string
 */
export declare function streamToString(readableStream: Stream): Promise<string>;