code: public static void init( ServletContext servletContext )
      {
          PageFlowFactoriesConfig factoriesBean = ConfigUtil.getConfig().getPageFlowFactories();
          FlowControllerFactory factory = null;
  
          if ( factoriesBean != null )
          {
              PageFlowFactoryConfig fcFactoryBean = factoriesBean.getPageFlowFactory();
              factory = ( FlowControllerFactory ) FactoryUtils.getFactory( servletContext, fcFactoryBean, FlowControllerFactory.class );
          }
  
          if ( factory == null )
              factory = new FlowControllerFactory();
  
          factory.reinit( servletContext );
  
          servletContext.setAttribute( CONTEXT_ATTR, factory );
      }
docs: Initialize an instance of this class in the ServletContext.  This is a framework-invoked
  method and should not normally be called directly.