import { VisitLog } from './VisitLog';
/**
 * Logs visited URLs to prevent repeated scans
 * with file backing up solution
 */
export declare class VisitLogFile extends VisitLog {
    private readonly path?;
    private logger?;
    constructor(path?: string | undefined);
    readonly setupFromFile: (path?: string | undefined) => Promise<boolean>;
    add(url: string): void;
}