docs: public Config build() throws ConfigException {
  		if (properties != null) {
  			Config config = new Config("properties");
  			config.setProperties(properties);
  			return config;
  		}
  
  		try {
  			Loader loader = new Loader();
  
  			SAXParserFactory factory = SAXParserFactory.newInstance();
  			SAXParser parser = factory.newSAXParser();
  			XMLReader reader = parser.getXMLReader();
  			reader.setContentHandler(loader);
  			reader.parse(new InputSource(xmlStream));
  
  			return loader.getConfig();
  		} catch (Exception e) {
  			throw new ConfigException(e);
  		}
  	}