private HashSet<PsiFile> getPackageFiles(final PsiPackage psiPackage) {
    final HashSet<PsiFile> psiFiles = new HashSet<>();
    final PsiClass[] classes = psiPackage.getClasses();
    for (PsiClass aClass : classes) {
      final PsiFile file = aClass.getContainingFile();
      if (myBuilder.getScope().contains(file)) {
        psiFiles.add(file);
      }
    }
    return psiFiles;
  }
private HashSet<PsiFile> getPackageFiles(final PsiPackage psiPackage)