private void addHighlighter(TextRange r, int level, TextAttributesKey key) {
    MarkupModel markupModel = myEditor.getMarkupModel();
    RangeHighlighter highlighter = markupModel.addRangeHighlighter(key, r.getStartOffset(), r.getEndOffset(), level,
                                                                   HighlighterTargetArea.EXACT_RANGE);
    myActiveHighliters.add(highlighter);
  }
private void addHighlighter(TextRange r, int level, TextAttributesKey key)