code: public static Xml exports(SizeConfig config)
      {
          Check.notNull(config);
  
          final Xml node = new Xml(NODE_SIZE);
          node.writeInteger(ATT_WIDTH, config.getWidth());
          node.writeInteger(ATT_HEIGHT, config.getHeight());
  
          return node;
      }
docs: Export the size node from data.
  
  @param config The config reference (must not be <code>null</code>).
  @return The size node.
  @throws LionEngineException If unable to read node.