export declare function injectRSCPayload(rscStream: ReadableStream, { injectClosingTags, }: {
    injectClosingTags?: boolean;
}): TransformStream;
/**
 * Inject CSS link tags into HTML stream before closing head tag
 */
export declare function injectCSS(cssFiles: string[], { injectClosingTags, }?: {
    injectClosingTags?: boolean;
}): TransformStream;