/// <reference types="node" />
/**
 * Converts a stream to a promise resolved when the stream ends or reject when an error happens.
 * There is no resolved value.
 *
 * @param stream The stream to promisify
 * @returns A promise resolved once the stream ends
 */
export declare function streamToPromise(stream: NodeJS.ReadableStream): Promise<void>;
export declare function deleteUndefinedProperties(obj: any): void;