/**
 * `nextra/dist/server/page-map/placeholder.js` imports all `metadata`s from `.md`/`.mdx` files to
 * build `pageMap`.
 * If a request includes the resource query `?metadata`, compiling MDX to JSX is unnecessary.
 * This step can be skipped to improve performance in the development environment.
 */
declare function compileMetadata(source: string, { filePath, lastCommitTime }: {
    filePath: string;
    lastCommitTime?: number;
}): Promise<string>;

export { compileMetadata };