docs: @Override
      protected void doCommonFilter(PortletRequest request, PortletResponse response,
              javax.portlet.filter.FilterChain chain) throws IOException, PortletException {
  
          if (logger.isDebugEnabled()) {
              logger.debug("Checking secure context token: " + SecurityContextHolder.getContext().getAuthentication());
          }
  
          if (requiresAuthentication((PortletRequest) request)) {
              doAuthenticate((PortletRequest) request, (PortletResponse) response);
          }
  
          PortletFilterUtils.doFilter(request, response, chain);
      }