code: public Xml getChild(String name)
      {
          Check.notNull(name);
  
          final NodeList list = root.getChildNodes();
          for (int i = 0; i < list.getLength(); i++)
          {
              final Node node = list.item(i);
              if (node instanceof Element && node.getNodeName().equals(name))
              {
                  return new Xml(document, (Element) node);
              }
          }
          throw new LionEngineException(ERROR_NODE + name);
      }
docs: Get a child node from its name.
  
  @param name The child name (must not be <code>null</code>).
  @return The child node reference.
  @throws LionEngineException If no node is found at this child name.