export declare function isMissingInternalCssSource(file: string, packageDir: string): boolean;
export declare function normalizeVitePersistentCacheKey(file: string): string;
export declare function toMb(bytes: number): number;
export declare function summarizeStringCache(map: Map<string, string>): {
    bytes: number;
    mb: number;
    size: number;
};
export declare function summarizeViteProcessedCssResults(map: Map<string, {
    css: string;
}>): {
    bytes: number;
    mb: number;
    size: number;
};