@Override
  public boolean isDeprecated() {
    boolean html4Deprecated = ourHtml4DeprecatedTags.contains(myDelegate.getName());
    MdnSymbolDocumentation documentation = doIfNotNull(
      myDelegate.getDeclaration(), declaration -> MdnDocumentationKt.getHtmlMdnDocumentation(declaration, null));
    boolean html5Deprecated = documentation != null && WebSymbolApiStatus.isDeprecatedOrObsolete(documentation.getApiStatus())
                              || ourHtml5DeprecatedTags.contains(myDelegate.getName());
    if (!html4Deprecated && !html5Deprecated) {
      return false;
    }
    boolean inHtml5 = HtmlUtil.isHtml5Schema(getNSDescriptor());
    return inHtml5 && html5Deprecated || !inHtml5 && html4Deprecated;
  }
@Override
  public boolean isDeprecated()