import { Subject } from 'rxjs/Subject';
import { Observable } from 'rxjs/Observable';
export declare class TreeDraggedElement {
    _draggedElement: any;
    set(draggedElement: any): void;
    _dragEventSubject: Subject<DragEvent>;
    setDragEvent(e: DragEvent): void;
    readonly dragEventObservable: Observable<DragEvent>;
    get(): any;
    isDragging(): boolean;
}