if (logger.isTraceEnabled()) {
                logger.trace("[LLM] LLM not available. ragChatEnabled=false");
            }
            return false;
        }
        final LlmClient client = getClient();
        final boolean isAvailable = client != null && client.isAvailable();
        if (logger.isTraceEnabled()) {

    /**
     * Gets the appropriate crawler client for the given URL.
     * @param url The URL to get a client for.
     * @return The crawler client.
     */
    protected CrawlerClient getClient(final String url) {
        return clientFactory.getClient(url);
    }

    /**
     * Checks if the content has been updated since the last crawl.
     * @param client The crawler client.
     * @param urlQueue The URL queue entry.

    InetAddress server = InetAddresses.forString(serverStr);
    assertThat(teredo.getServer()).isEqualTo(server);

    InetAddress client = InetAddresses.forString(clientStr);
    assertThat(teredo.getClient()).isEqualTo(client);

    assertEquals(port, teredo.getPort());
    assertEquals(flags, teredo.getFlags());
  }

  public void testTeredoAddress_nullServer() {

        }

        final CrawlerClientFactory crawlerClientFactory = crawlingConfig.initializeClientFactory(ComponentUtil::getCrawlerClientFactory);
        final CrawlerClient client = crawlerClientFactory.getClient(url);
        if (client == null) {
            throw new CrawlingAccessException(
                    "CrawlerClient is null for URL: " + url + ". Unable to access the document without a crawler client.");
        }

      this.port = port;
      this.flags = flags;
    }

    public Inet4Address getServer() {
      return server;
    }

    public Inet4Address getClient() {
      return client;
    }

    public int getPort() {
      return port;
    }

    public int getFlags() {
      return flags;
    }
  }

  /**

        final String assistantContentMode = fessConfig.getOrDefault("rag.chat.history.assistant.content", "smart_summary");

        final LlmClient client = llmClientManager.getClient();
        final int assistantMaxChars = client != null ? client.getHistoryAssistantMaxChars() : 800;
        final int summaryMaxChars = client != null ? client.getHistoryAssistantSummaryMaxChars() : 800;