code: @Nullable
    public static Document visualizeToDOMDocument (@Nonnull final EEbInterfaceVersion eVersion,
                                                   @Nonnull final Source aSource)
    {
      final Document aDoc = XMLFactory.newDocument ();
      return visualize (eVersion, aSource, new DOMResult (aDoc)).isSuccess () ? aDoc : null;
    }
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 aSource
  Source. May not be <code>null</code>.
  @return <code>null</code> if the XSLT could not be applied.