/// <reference types="node" />
import fs from "fs";
import vorpal from "vorpal";
export declare class Logger {
    private readonly label?;
    private readonly vorpal?;
    fileStream?: fs.WriteStream;
    constructor(label?: string | (() => string) | undefined, vorpal?: vorpal | undefined);
    getLabel(): string;
    private _log;
    error(message: string, ...fmt: any[]): void;
    debug(message: string, ...fmt: any[]): void;
    warn(message: string, ...fmt: any[]): void;
    data(message: string, ...fmt: any[]): void;
    info(message: string, ...fmt: any[]): void;
}