import * as winston from 'winston';
export interface ICreateLoggerOptions {
    prefix?: string;
    level?: string;
    transportMode?: 'mute' | 'console';
}
interface ILogger extends winston.Logger {
    [k: string]: any;
}
export declare function createLogger({ prefix, level, transportMode }: ICreateLoggerOptions): void;
export declare const LOGGER: ILogger;
export declare function setLogger(logger: ILogger | null): void;
export {};