import { PoTreeViewItem } from '../po-tree-view-item/po-tree-view-item.interface';
export declare class PoTreeViewService {
    private readonly expandedEvent;
    private readonly selectedEvent;
    emitExpandedEvent(treeViewItem: PoTreeViewItem): void;
    emitSelectedEvent(treeViewItem: PoTreeViewItem): void;
    onExpand(): import("rxjs").Observable<PoTreeViewItem>;
    onSelect(): import("rxjs").Observable<PoTreeViewItem>;
}