type FakeCSSStyleSheet = {
    insertRule: CSSStyleSheet["insertRule"];
    deleteRule: CSSStyleSheet["deleteRule"];
    cssRules: ({
        cssText: string;
    } | undefined)[];
};
interface StyleSheet {
    inject(): void;
    isSpeedy(): boolean;
    setSpeedy(bool: boolean): void;
    insertRule(rule: string, index?: number): number;
    deleteRule(index: number): void;
    flush(): void;
    cssRules(): (CSSRule | undefined)[];
}
declare class StyleSheet implements StyleSheet {
    constructor(name: string, speedy?: boolean);
}

export { FakeCSSStyleSheet, StyleSheet };