/**
 * Await all promises and resolve if non of them failed.
 * Reject if at least one of them was rejected, but only once all of them are finished.
 * Throws an error consisting of a list of reasons.
 * @param promises - Promises to settle.
 * @param errorMessage - Message to use as introductory text of the error if an error occurs.
 */
export declare function finishAll(promises: Promise<any>[], errorMessage?: string): Promise<void>;