declare namespace Ext {
    export namespace util {
        export interface FocusableContainerConfig {
            activeChildTabIndex?: number;
            allowFocusingDisabledChildren?: boolean;
            enableFocusableContainer?: boolean;
            inactiveChildTabIndex?: number;
        }

        export class FocusableContainer extends Ext.Mixin  {
            public focusableContainerEl?: string | Ext.dom.Element;
        }
    }
}