code: @Nonnull
    public static String getAsHTMLString (@Nonnull final IHCNode aHCNode)
    {
      return getAsHTMLString (aHCNode, HCSettings.getConversionSettings ());
    }
docs: Convert the passed HC node to an HTML string using the default conversion
  settings.
  
  @param aHCNode
  The node to be converted. May not be <code>null</code>.
  @return The node as XML with or without indentation.