public static @NotNull DelegatingRelaxedHtmlElementDescriptor wrapInDelegating(XmlElementDescriptor descriptor) {
    return descriptor instanceof DelegatingRelaxedHtmlElementDescriptor ? (DelegatingRelaxedHtmlElementDescriptor)descriptor :
           new DelegatingRelaxedHtmlElementDescriptor(descriptor);
  }
public static @NotNull DelegatingRelaxedHtmlElementDescriptor wrapInDelegating(XmlElementDescriptor descriptor)