code: public static Xml exportClass(String clazz)
      {
          Check.notNull(clazz);
  
          final Xml node = new Xml(ATT_CLASS);
          node.setText(clazz);
  
          return node;
      }
docs: Export the featurable node from class data.
  
  @param clazz The class name (must not be <code>null</code>).
  @return The class node.
  @throws LionEngineException If unable to export node.