public DomElementsAnnotator getAnnotator(@NotNull Class<?> rootElementClass) {
    return classToAnnotator.computeIfAbsent(rootElementClass, key -> {
      DomFileDescription<?> desc = findFileDescription(key);
      return desc == null ? null : desc.createAnnotator();
    });
  }
public DomElementsAnnotator getAnnotator(@NotNull Class<?> rootElementClass)