protected void updateFieldFolding(@NotNull EditorEx editor) {
    FoldingModelEx model = editor.getFoldingModel();
    CharSequence text = editor.getDocument().getCharsSequence();
    model.runBatchFoldingOperation(() -> {
      model.clearFoldRegions();
      for (int i = 0; i < text.length(); i++) {
        if (text.charAt(i) == '\n') {
          model.createFoldRegion(i, i + 1, " \u23ce ", null, true);
        }
      }
    });
  }
protected void updateFieldFolding(@NotNull EditorEx editor)