declare namespace Ext {
    export namespace util {
        export interface CSSConfig {
        }

        export class CSS extends Ext.Base  {
            public createRule(styleSheet?: CSSStyleSheet, selector?: string, property?: string): CSSStyleRule;
            public createStyleSheet(cssText?: string, id?: string): CSSStyleSheet;
            public getRule(selector?: string | string[], refreshCache?: boolean): CSSStyleRule;
            public getRules(refreshCache?: boolean): object;
            public refreshCache(): object;
            public removeStyleSheet(stylesheet?: string | CSSStyleSheet): void;
            public swapStyleSheet(id?: string, url?: string): void;
            public updateRule(selector?: string | string[], property?: string, value?: string): boolean;
        }
    }
}