export declare class Logger {
    private level;
    constructor(level?: number);
    setLevel(level: number): void;
    log(level: number, ...message: string[]): void;
    error(...message: string[]): void;
    warn(...message: string[]): void;
    info(...message: string[]): void;
    debug(...message: string[]): void;
    trace(...message: string[]): void;
    start(...message: string[]): void;
    success(...message: string[]): void;
}