private void fillItems(PsiDirectory @NotNull [] directories,
                         @Nullable String postfixToShow,
                         @Nullable Map<PsiDirectory, String> postfixes) {
    for (PsiDirectory directory : directories) {
      ProgressManager.checkCanceled();
      final String postfixForDirectory;
      if (postfixes == null) {
        postfixForDirectory = postfixToShow;
      }
      else {
        postfixForDirectory = postfixes.get(directory);
      }
      myItems.add(new ItemWrapper(directory, postfixForDirectory));
    }
  }
private void fillItems(PsiDirectory @NotNull [] directories,
                         @Nullable String postfixToShow,
                         @Nullable Map<PsiDirectory, String> postfixes)