export declare function normalizeRpxLengthCandidates(candidates: Iterable<string>): {
    candidates: Set<string>;
    restoreCandidates: Map<string, string>;
};
export declare function restoreRpxLengthCandidates(candidates: Iterable<string>, restoreCandidates: ReadonlyMap<string, string>): Set<string>;
export declare function restoreRpxLengthCssSelectors(css: string, restoreCandidates: ReadonlyMap<string, string>): string;