import { Confidant, Task, TaskMaker } from "../task";
import { EmptyContext } from "../../util/emptyContext";
export declare const DELAY = 100;
export declare const TIMEOUT = 1000;
declare class Echo_<T> extends Task<EmptyContext, T> {
    value_: T;
    delay_: number;
    onInvalidate_: (task: Echo<T>) => Promise<void>;
    constructor(confidant: Confidant<EmptyContext, Record<string, any>>, value_: T, delay_: number, onInvalidate_: (task: Echo<T>) => Promise<void>);
    initialize(): Promise<T>;
    invalidate(path?: string): Promise<void>;
}
export declare const Echo: <T>(value: T, delay?: number, onInvalidate?: (task: Echo<T>) => Promise<void>) => TaskMaker<EmptyContext, T>;
export declare type Echo<T> = Echo_<T>;
export {};
//# sourceMappingURL=echo.d.ts.map