code: protected void showHtmlTransition(HtmlResponse response) {
          if (logger.isDebugEnabled()) {
              final String ing = response.isRedirectTo() ? "Redirecting" : "Forwarding";
              final String path = response.getRoutingPath(); // not null
              final String tag = path.endsWith(".html") ? "#html " : (path.endsWith(".jsp") ? "#jsp " : "");
              logger.debug("#flow ...{} to {}{}", ing, tag, path);
          }
      }
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