code: @Nullable
    public static Document visualizeToDOMDocument (@Nonnull final EEbInterfaceVersion eVersion,
                                                   @Nonnull final IReadableResource aResource)
    {
      return visualizeToDOMDocument (eVersion, TransformSourceFactory.create (aResource));
    }
docs: Visualize a source to a DOM document for a certain ebInterface version.
  
  @param eVersion
  ebInterface version to use. May not be <code>null</code>.
  @param aResource
  Source resource. May not be <code>null</code>.
  @return <code>null</code> if the XSLT could not be applied.