public static void addAttributeReferenceCompletionVariants(XmlAttributeReference reference, CompletionResultSet result,
                                                             @Nullable InsertHandler<LookupElement> replacementInsertHandler) {
    final XmlTag declarationTag = reference.getElement().getParent();
    LOG.assertTrue(declarationTag.isValid());
    final XmlElementDescriptor parentDescriptor = declarationTag.getDescriptor();
    if (parentDescriptor != null) {
      final XmlAttribute[] attributes = declarationTag.getAttributes();
      XmlAttributeDescriptor[] descriptors = parentDescriptor.getAttributesDescriptors(declarationTag);

      descriptors = HtmlUtil.appendHtmlSpecificAttributeCompletions(declarationTag, descriptors, reference.getElement());

      addVariants(result, attributes, descriptors, reference.getElement(), replacementInsertHandler);
    }
  }
public static void addAttributeReferenceCompletionVariants(XmlAttributeReference reference, CompletionResultSet result,
                                                             @Nullable InsertHandler<LookupElement> replacementInsertHandler)