import type * as postcss from 'postcss';
export declare function isAsset(url: string): boolean;
export declare function isRelativeNativeCss(fullPath: string): boolean;
export declare function makeAbsolute(host: {
    join: (...paths: string[]) => string;
    isAbsolute: (path: string) => boolean;
}, resourcePath: string, rootContext: string, moduleContext: string): string;
export declare function fixRelativeUrls(ast: postcss.Root, originPath: string, targetPath: string): void;
export declare function assureRelativeUrlPrefix(url: string): string;
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