export declare class StyleSheet {
    private isSpeedy;
    disabled: boolean;
    injected: boolean;
    constructor(isSpeedy?: boolean);
    ruleIndexes: string[];
    tag: HTMLStyleElement | null;
    getRuleCount(): number;
    flush(): void;
    inject(): void;
    delete(key: string): void;
    insert(key: string, rule: string): void;
}
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