/**
 * Shortens a fully resolved filename to a short path that would be respected by
 * `require`.
 * @example
 * '/long/absolute/path/to/node_modules/package/lib/file.js' => 'package/lib/file'
 *
 * @param {{
 *   name: string;
 *   packageDir: string;
 *   file: string;
 *   main?: string;
 * }} opts
 * @returns {string}
 */
export function getShortname({ name, packageDir, file, main }: {
    name: string;
    packageDir: string;
    file: string;
    main?: string;
}): string;
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