import { Element_ } from '../../../../../Class/Element';
import { Done } from '../../../../../Class/Functional/Done';
import { Holder } from '../../../../../Class/Holder';
import { System } from '../../../../../system';
import { C } from '../../../../../types/interface/C';
export interface I {
    parent: Element_;
    at: number;
    done: any;
}
export interface O {
    child: C;
}
export default class ParentChild extends Holder<I, O> {
    private _unlisten;
    constructor(system: System);
    f({ parent, at }: I, done: Done<O>): void;
    d(): void;
}
