/**
  * Adds runonce files of a package to the RunonceManager instance.
  *
  * @param PackageInterface $package The package being processed.
  *
  * @param array            $files   The file names of all runonce files.
  *
  * @return void
  */
 protected function addRunonces(PackageInterface $package, array $files)
 {
     $rootDir = $this->getInstallPath($package);
     foreach ($files as $file) {
         $this->runonceManager->addFile($this->filesystem->normalizePath($rootDir . '/' . $file));
     }
 }