/// <reference types="node" />
import { Handle } from '@theintern/common';
export declare function on(emitter: NodeJS.EventEmitter, event: string | symbol, listener: (...args: any[]) => void): Handle;
export declare function fileExists(filename: string): boolean;
export declare function kill(pid: number | undefined): void;
export declare function writeFile(data: any, filename: string): Promise<void>;