/// <reference types="node" />
import { EventEmitter } from "events";
export declare class Watcher extends EventEmitter {
    private path;
    private exists;
    private watch_contents?;
    private watch_existence?;
    private debounce_ms;
    private log;
    constructor(path: string, debounce_ms: number, log: Function);
    private init;
    private init_watch_contents;
    private init_watch_existence;
    private change;
    close(): void;
}