import { RequestOpt } from '../../../../../API';
import { $ } from '../../../../../Class/$';
import { Done } from '../../../../../Class/Functional/Done';
import { Fail } from '../../../../../Class/Functional/Fail';
import { Holder } from '../../../../../Class/Holder';
import { System } from '../../../../../system';
import { BO } from '../../../../../types/interface/BO';
import { RES } from '../../../../../types/interface/RES';
export type I = {
    url: string;
    opt: RequestOpt;
    body: BO & $;
    done: any;
};
export type O = {
    res: RES & $;
    done: any;
};
export default class Fetch extends Holder<I, O> {
    constructor(system: System);
    f({ url, opt, body }: I, done: Done<O>, fail: Fail): Promise<void>;
    b(): void;
}
