declare namespace Ext {
    export namespace drag {
        export interface TargetConfig {
            accepts?: CallableFunction;
            autoDestroy?: boolean;
            element?: string | Ext.dom.Element;
            groups?: string | string[];
            invalidCls?: string;
            listeners?: object;
        }

        export class Target extends Ext.drag.Item  {
            public accepts(info?: Ext.drag.Info): boolean;
            public beforeDrop(info?: Ext.drag.Info): boolean;
            public getInvalidCls(): void;
            public onDragEnter(info?: Ext.drag.Info): void;
            public onDragLeave(info?: Ext.drag.Info): void;
            public onDragMove(info?: Ext.drag.Info): void;
            public onDrop(info?: Ext.drag.Info): void;
            public setInvalidCls(): void;
        }
    }
}