declare namespace Ext {
    export namespace tree {
        export interface ViewDragZoneConfig {
            animRepair?: boolean;
            containerScroll?: object | boolean;
            ddGroup?: string;
            dropAllowed?: string;
            dropNotAllowed?: string;
            repairHighlightColor?: string;
            scrollEl?: string | Ext.dom.Element;
        }

        export class ViewDragZone extends Ext.view.DragZone  {
        }
    }
}