/**
 * @callback BeforeShutdownListener
 * @param {string} [signalOrEvent] The exit signal or event name received on the process.
 */
/**
 * Registers a new shutdown listener to be invoked before exiting
 * the main process. Listener handlers are guaranteed to be called in the order
 * they were registered.
 * @param {BeforeShutdownListener} listener The shutdown listener to register.
 * @returns {BeforeShutdownListener} Echoes back the supplied `listener`.
 */
declare function beforeShutdown(listener: any): any;
export { beforeShutdown };