@Test
    void testValidateUniqueServerId() throws Exception {
        Settings settings = new Settings();
        Server server1 = new Server();
        server1.setId("test");
        settings.addServer(server1);
        Server server2 = new Server();
        server2.setId("test");
        settings.addServer(server2);

        SimpleProblemCollector problems = new SimpleProblemCollector();

            dataService.delete(sessionId);
        } finally {
            server.stop();
        }
    }

    public void test_execute_2instanceTx() throws Exception {
        final CrawlerWebServer server1 = new CrawlerWebServer(7070);
        server1.start();
        final CrawlerWebServer server2 = new CrawlerWebServer(7071);
        server2.start();

        final String url1 = "http://localhost:7070/";

        this.servers = (servers != null) ? servers : new ArrayList<>();
        this.proxies = (proxies != null) ? proxies : new ArrayList<>();
        this.problems = (problems != null) ? problems : new ArrayList<>();
    }

    @Override
    public Server getServer() {
        return servers.isEmpty() ? null : servers.get(0);
    }

        List<SettingsProblem> problems = new ArrayList<>();

        List<Server> servers = new ArrayList<>();

        for (Server server : request.getServers()) {
            server = server.clone();

            String password = server.getPassword();
            if (securityDispatcher.isAnyEncryptedString(password)) {
                try {

    }

    @Override
    public List<Server> getServers() {
        if (servers == null) {
            servers = new ArrayList<>();
        }

        return servers;
    }

    @Override
    public DefaultSettingsDecryptionRequest setServers(List<Server> servers) {
        this.servers = servers;

        return this;
    }

    @Override

    /**
     * Sets the servers whose passwords should be decrypted.
     *
     * @param servers The servers to decrypt, may be {@code null}.
     * @return This request, never {@code null}.
     */
    SettingsDecryptionRequest setServers(List<Server> servers);

    /**
     * Gets the proxies whose passwords should be decrypted.
     *
     * @return The proxies to decrypt, never {@code null}.
     */
    List<Proxy> getProxies();

browser("Browser")
proxy["Proxy on http://0.0.0.0:9999/api/v1/app"]
server["Server on http://127.0.0.1:8000/app"]

browser --> proxy
proxy --> server
```

/// tip | "Dica"

O IP `0.0.0.0` é comumente usado para significar que o programa escuta em todos os IPs disponíveis naquela máquina/servidor.

///

A interface de documentação também precisaria do OpenAPI schema para declarar que API `server` está localizado em `/api/v1` (atrás do proxy). Por exemplo:

     *
     * @return The decrypted server or {@code null}.
     */
    Server getServer();

    /**
     * Gets the decrypted servers.
     *
     * @return The decrypted server, can be empty but never {@code null}.
     */
    List<Server> getServers();

    /**
     * Gets the decrypted proxy. This is a convenience method to retrieve the first element from {@link #getProxies()}.
     *

    }

    @Override
    public List<Server> getServers() {
        if (servers == null) {
            servers = new ArrayList<>();
        }
        return servers;
    }

    @Override
    public MavenExecutionRequest setServers(List<Server> servers) {
        if (servers != null) {
            this.servers = new ArrayList<>(servers);
        } else {
            this.servers = null;

                List<Server> servers = request.getServers();

                if (servers != null) {
                    for (Server server : servers) {
                        if (id.equalsIgnoreCase(server.getId())) {
                            SettingsDecryptionResult result =
                                    settingsDecrypter.decrypt(new DefaultSettingsDecryptionRequest(server));