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

            export class DragZone extends Ext.dd.DragZone  {
            }
        }
    }
}