import { Observable } from "rxjs";
import { DataRequest } from "./data-request";
import { DataResult } from "./data-result";
import { DataSource } from "./data-source";
export type DataLoaderFunc = (request: DataRequest) => Observable<DataResult>;
export declare class AsyncDataSource extends DataSource {
    private _loader;
    constructor(loader: DataLoaderFunc);
    load(request: DataRequest): void;
}