declare namespace Ext {
    export namespace layout {
        export namespace container {
            export interface FormConfig {
                animatePolicy?: object;
                childEls?: object | string[] | object[];
                itemCls?: string;
                itemSpacing?: number;
                labelWidth?: number | string;
                reserveScrollbar?: boolean;
            }

            export class Form extends Ext.layout.container.Auto  {
            }
        }
    }
}