import { SnarfetchOptions } from './options';
import { RequestInfo, RequestInit, Response } from 'node-fetch';
export declare class Target {
    #private;
    constructor(options: Required<SnarfetchOptions>);
    fetch(url: RequestInfo, init?: RequestInit): Promise<Response>;
    gc(limit: number): Promise<number>;
}
export declare type TargetKey = `${string}:${string}`;
export declare const extractTargetKey: (source: RequestInfo) => TargetKey;