private @NotNull SortedSet<String> getSelectedPaths() {
      TreeSet<String> selected = new TreeSet<>();
      for (Map.Entry<String, Boolean> entry : mySelectedFiles.entrySet()) {
        if (isChecked(entry.getValue())) {
          selected.add(entry.getKey());
        }
      }
      return Collections.unmodifiableSortedSet(selected);
    }
private @NotNull SortedSet<String> getSelectedPaths()