@Override
    public Result<PsiModifierList> compute() {
      List<PsiModifierList> modifiers = new ArrayList<>();
      for(PsiDirectory directory: getDirectories()) {
        PsiFile file = directory.findFile(PACKAGE_INFO_FILE);
        PsiPackageStatement stmt = file == null ? null : PsiTreeUtil.getChildOfType(file, PsiPackageStatement.class);
        PsiModifierList modifierList = stmt == null ? null : stmt.getAnnotationList();
        ContainerUtil.addIfNotNull(modifiers, modifierList);
      }

      for (PsiClass aClass : getFacade().findClasses(getQualifiedName() + ".package-info", allScope())) {
        ContainerUtil.addIfNotNull(modifiers, aClass.getModifierList());
      }

      PsiCompositeModifierList result = modifiers.isEmpty() ? null : new PsiCompositeModifierList(getManager(), modifiers);
      return new Result<>(result, PsiModificationTracker.MODIFICATION_COUNT);
    }
@Override
    public Result<PsiModifierList> compute()