import { GenericUnit } from './generic-unit';
import { AsyncSystemConfig } from '../models';
import { AsyncSystemBase } from './async-system-base';
/**
 * AsyncSystem is a reactive storage System, to store, replay and wait for simple async tasks.
 *
 * An AsyncSystem is a systematic combination of four Units.
 * one each for every aspect of an asynchronous task or API, \
 * e.g.: XHR, fetch or a third party abstraction like Angular's HttpClient.
 *
 * See {@link https://docs.activejs.dev/fundamentals/systems/asyncsystem} for more details.
 *
 * - AsyncSystem extends {@link AsyncSystemBase},
 *   which further extends {@link Base} and `Observable`
 *
 * @category 3. Systems
 */
export declare class AsyncSystem<Query, Data, Error> extends AsyncSystemBase<GenericUnit<Query>, GenericUnit<Data>, GenericUnit<Error>> {
    /**
     * Configured options. \
     * Combination of global-options {@link GlobalAsyncSystemConfig} and the options passed on instantiation.
     */
    readonly config: Readonly<AsyncSystemConfig<Query, Data, Error>>;
    constructor(config?: AsyncSystemConfig<Query, Data, Error>);
}