import { Observable } from 'rxjs';
export interface DataSourceViewer {
    id?: string;
    viewChange?: Observable<any>;
    [key: string]: any;
}
export interface DataSource<Data = unknown, Viewer extends DataSourceViewer = DataSourceViewer> {
    loading$?: Observable<boolean>;
    hasError$?: Observable<boolean>;
    connect(viewer: Viewer): Observable<Data>;
    connect(viewerId: string): Observable<Data>;
    disconnect(viewer: Viewer): void;
    disconnect(viewerId: string): void;
    refresh(): void;
}