docs: @Override
      public void init(
              PortletConfig portletConfig,
              ServletContext servletContext,
              HttpServletRequest servletRequest,
              HttpServletResponse servletResponse) {
          Assert.notNull(portletConfig, "portletConfig cannot be null");
          Assert.notNull(servletContext, "servletContext cannot be null");
  
          super.init(servletRequest, servletResponse);
  
          this.portletConfig = portletConfig;
          this.servletContext = servletContext;
      }