export declare function formatParcelError(err: unknown): string;
/**
 * Bundles must have unique names. This report which entries produce duplicate names based on the file name w/o the extension.
 * @returns an array of duplicates with the target dir. e.g. [[MyFetcher.js, MyFetcher.ts]]
 */
export declare function findBundleNameDuplicates(entries: string[]): string[][];