code: public static synchronized RenderEngine getInstance(String name) {
      if (null == availableEngines) {
        availableEngines = new HashMap();
      }
  
      //Logger.debug("Engines: " + availableEngines);
      return (RenderEngine) availableEngines.get(name);
    }
docs: Get an instance of a RenderEngine. This is a factory method.
  
  @param name Name of the RenderEngine to get
  @return engine RenderEngine for the requested name