declare namespace Ext {
    export namespace ux {
        export namespace dd {
            export interface CellFieldDropZoneConfig {
                containerScroll?: boolean;
                ddGroup?: string;
                dropAllowed?: string;
                dropNotAllowed?: string;
                onCellDrop?: string | CallableFunction;
                overClass?: string;
            }

            export class CellFieldDropZone extends Ext.dd.DropZone  {
                public onCellDrop(fieldName?: string, value?: any): void;
            }
        }
    }
}