private void paintLineMarkersSeparators(MarkupModelEx markupModel) {
      markupModel.processRangeHighlightersOverlappingWith(mySeparatorHighlightersStartOffset, mySeparatorHighlightersEndOffset,
                                                          highlighter -> {
                                                            paintLineMarkerSeparator(highlighter);
                                                            return true;
                                                          });
    }
private void paintLineMarkersSeparators(MarkupModelEx markupModel)