code: @Nullable
    public static String getNodeAsString (@Nonnull final Node aNode)
    {
      return getNodeAsString (aNode, XMLWriterSettings.DEFAULT_XML_SETTINGS);
    }
docs: Convert the passed DOM node to an XML string using
  {@link XMLWriterSettings#DEFAULT_XML_SETTINGS}. This is a specialized
  version of {@link #getNodeAsString(Node, IXMLWriterSettings)}.
  
  @param aNode
  The node to be converted to a string. May not be <code>null</code> .
  @return The string representation of the passed node.
  @since 8.6.3