import { Level } from './level';
import { MethodBinder } from './services/method-binder';
export declare abstract class Logger {
    static methodBinder: MethodBinder;
    protected constructor();
    abstract error(message: unknown, metadata?: object): void;
    abstract warn(message: unknown, metadata?: object): void;
    abstract info(message: unknown, metadata?: object): void;
    abstract debug(message: unknown, metadata?: object): void;
    abstract trace(message: unknown, metadata?: object): void;
    abstract metadata(metadata: object): Logger;
    abstract tag(tag: string): Logger;
    abstract data(data: unknown): Logger;
    abstract setLevel(level: Level): void;
}