declare namespace Ext {
    export namespace dom {
        export interface HelperConfig {
        }

        export class Helper extends Ext.Base  {
            public append(el?: string | Ext.dom.Element | HTMLElement, o?: object | string, returnElement?: boolean): Ext.dom.Element | HTMLElement;
            public applyStyles(el?: string | Ext.dom.Element | HTMLElement, styles?: string | object | CallableFunction): void;
            public createDom(o?: object | string): HTMLElement;
            public createHtml(spec?: object): void;
            public createTemplate(o?: object): Ext.Template;
            public generateStyles(styles?: object, buffer?: string[], encode?: boolean): string | string[];
            public insertAfter(el?: string | Ext.dom.Element | HTMLElement, o?: object, returnElement?: boolean): Ext.dom.Element | HTMLElement;
            public insertBefore(el?: string | Ext.dom.Element | HTMLElement, o?: object | string, returnElement?: boolean): Ext.dom.Element | HTMLElement;
            public insertFirst(el?: string | Ext.dom.Element | HTMLElement, o?: object | string, returnElement?: boolean): Ext.dom.Element | HTMLElement;
            public insertHtml(where?: string, el?: Text | HTMLElement, html?: string): HTMLElement;
            public markup(spec?: object): string;
            public overwrite(el?: string | Ext.dom.Element | HTMLElement, o?: object | string, returnElement?: boolean): Ext.dom.Element | HTMLElement;
        }
    }
}