/**
 * Crash logger
 * Pokemon Showdown - http://pokemonshowdown.com/
 *
 * Logs crashes, sends an e-mail notification if you've set up
 * config.js to do that.
 *
 * @license MIT
 */
/**
 * Logs when a crash happens to console, then e-mails those who are configured
 * to receive them.
 */
export declare function crashlogger(error: unknown, description: string, data?: AnyObject | null, emailConfig?: AnyObject | null): string | null;