/**
 * Find duplicates in the lockfile content.
 * @param lockfile The contents of pnpm-lock.yaml / package-lock.json, etc.
 * @example
 * let duplicates = dup(fs.readFileSync('pnpm-lock.yaml', 'utf8'))
 * let duplicates = dup(require('./package-lock.json'))
 * console.log(duplicates) //=> { "foo": ["1.0.0", "2.0.0"] }
 */
declare function dup(lockfile: unknown): {
    [name: string]: string[];
};

export { dup };