export declare type Levels = 'fatal' | 'error' | 'warn' | 'info' | 'debug' | 'trace';
export interface LogObject {
    [key: string]: any;
}
export interface ErrorObject extends LogObject {
    err?: Error;
}
export interface Logger {
    trace(msg: string | LogObject): void;
    trace(obj: LogObject, msg: string): void;
    debug(msg: string | LogObject): void;
    debug(obj: LogObject, msg: string): void;
    info(msg: string | LogObject): void;
    info(obj: LogObject, msg: string): void;
    warn(msg: string): void;
    warn(obj: LogObject, msg: string): void;
    error(msg: string): void;
    error(obj: ErrorObject, msg: string): void;
    fatal(msg: string): void;
    fatal(obj: ErrorObject, msg: string): void;
    child(childObj: LogObject): Logger;
}
export declare function noopLogger(): {
    trace: () => void;
    debug: () => void;
    info: () => void;
    warn: () => void;
    error: () => void;
    fatal: () => void;
    child: () => any;
};
export declare function consoleLogger(level?: Levels, context?: LogObject): Logger;