Map<String, Object> docMap = new HashMap<>();
        docMap.put("mimetype", null);
        assertFalse(thumbnailGenerator.isTarget(docMap));
    }

    public void test_isAvailable() {
        // Test availability check
        assertTrue(thumbnailGenerator.isAvailable());
    }

    public void test_destroy() {
        // Test destroy method - should not throw exception
        thumbnailGenerator.destroy();

      )

    // This is nearly equal to the cipher suites supported in Chrome 72, current as of 2019-02-24.
    // See https://tinyurl.com/okhttp-cipher-suites for availability.
    private val APPROVED_CIPHER_SUITES =
      listOf(
        // TLSv1.3.
        CipherSuite.TLS_AES_128_GCM_SHA256,
        CipherSuite.TLS_AES_256_GCM_SHA384,

    /** The name of this thumbnail generator. */
    protected String name;

    /** Maximum number of redirects to follow. */
    protected int maxRedirectCount = 10;

    /** Availability status of this generator. */
    protected Boolean available = null;

    /**
     * Registers this thumbnail generator with the thumbnail manager.
     */
    public void register() {

   * available for all platforms and configurations. If that implementation is unavailable, this
   * method falls back to {@code getStackTrace}. Callers that require the special implementation can
   * check its availability with {@link #lazyStackTraceIsLazy()}.
   *
   * <p>The expected (but not guaranteed) performance of the special implementation differs from

    public void test_run_componentNotAvailable() throws Exception {
        final List<String> sessionIdList = Arrays.asList("session1");
        indexUpdater.setSessionIdList(sessionIdList);

        // Set component availability to false after some time
        new Thread(() -> {
            ThreadUtil.sleep(200);
            ((TestSystemHelper) systemHelper).setComponentAvailable(false);
        }).start();

    ```

### Timeouts ([.kt][ConfigureTimeoutsKotlin], [.java][ConfigureTimeoutsJava])

Use timeouts to fail a call when its peer is unreachable. Network partitions can be due to client connectivity problems, server availability problems, or anything between. OkHttp supports connect, write, read, and full call timeouts.

=== ":material-language-kotlin: Kotlin"
    ```kotlin
      private val client: OkHttpClient = OkHttpClient.Builder()

automate deployment and rolling updates of applications, specified
declaratively. It handles versioning, multiple simultaneous rollouts,
aggregating status across all pods, maintaining application availability, and
rollback.
  * <strong>Automated cluster management: </strong>
     * Kubernetes clusters can now span zones within a cloud provider. Pods from a