/**
 * Takes a page and transforms it into its file counterpart ensuring that the
 * output is normalized. Note this function is not idempotent because a page
 * `/index` can be referencing `/index/index.js` and `/index/index` could be
 * referencing `/index/index/index.js`. Examples:
 *  - `/` -> `/index`
 *  - `/index/foo` -> `/index/index/foo`
 *  - `/index` -> `/index/index`
 */
export declare function normalizePagePath(page: string): string;