private static void registerAdditionalHighlighters(MultiMap<IElementType, TextAttributesKey> map, EmbeddedTokenHighlighter highlighter) {
    MultiMap<IElementType, TextAttributesKey> attributes = highlighter.getEmbeddedTokenAttributes();
    for (Map.Entry<IElementType, Collection<TextAttributesKey>> entry : attributes.entrySet()) {
      if (!map.containsKey(entry.getKey())) {
        map.putValues(entry.getKey(), entry.getValue());
      }
    }
  }
private static void registerAdditionalHighlighters(MultiMap<IElementType, TextAttributesKey> map, EmbeddedTokenHighlighter highlighter)