public void testIsPresent_yes() {
    assertTrue(Optional.of("training").isPresent());
  }

  public void testGet_absent() {
    Optional<String> optional = Optional.absent();
    assertThrows(IllegalStateException.class, optional::get);
  }

  public void testGet_present() {
    assertThat(Optional.of("training").get()).isEqualTo("training");
  }

        return type;
    }

    /**
     * Sets the highlighting type with fluent interface.
     *
     * @param type the highlighting type to set
     * @return this HighlightInfo instance for method chaining
     */
    public HighlightInfo type(final String type) {
        this.type = type;
        return this;
    }

    /**
     * Gets the fragment size.
     *

     * @return this request for method chaining
     */
    public LlmChatRequest addMessage(final LlmMessage message) {
        messages.add(message);
        return this;
    }

    /**
     * Adds a system message to the request.
     *
     * @param content the message content
     * @return this request for method chaining
     */

    return from(CacheBuilderSpec.parse(spec));
  }

  /**
   * Enables lenient parsing. Useful for tests and spec parsing.
   *
   * @return this {@code CacheBuilder} instance (for chaining)
   */
  @GwtIncompatible // To be supported
  @CanIgnoreReturnValue
  CacheBuilder<K, V> lenientParsing() {
    strictParsing = false;
    return this;
  }

  /**

  }

  public void testInputFutureToString() throws Throwable {
    assertThat(resultFuture.toString()).contains(inputFuture.toString());
  }

  /**
   * Override to return a chaining listenableFuture that returns the result of getSuccessfulResult()
   * when inputFuture returns VALID_INPUT_DATA, and sets the exception to EXCEPTION in all other
   * cases.
   */

    @Test
    public void test_expiry_validValue() {
        long newExpiry = 60L * 24 * 60 * 60 * 1000L; // 60 days
        PurgeThumbnailJob result = purgeThumbnailJob.expiry(newExpiry);

        // Test method chaining
        assertSame(purgeThumbnailJob, result);
        // Test value was set
        assertEquals(newExpiry, purgeThumbnailJob.getExpiry());
    }

    // Test expiry setter with zero value (should not change)

    [`tf.distribute.Strategy`](https://www.tensorflow.org/beta/guide/distribute_strategy)
    API to distribute training with minimal code changes, yielding great
    out-of-the-box performance. It supports distributed training with Keras
    model.fit, as well as with custom training loops. Multi-GPU support is
    available, along with experimental support for multi worker and Cloud TPUs.
    Check out the

    return from(CacheBuilderSpec.parse(spec));
  }

  /**
   * Enables lenient parsing. Useful for tests and spec parsing.
   *
   * @return this {@code CacheBuilder} instance (for chaining)
   */
  @GwtIncompatible // To be supported
  @CanIgnoreReturnValue
  CacheBuilder<K, V> lenientParsing() {
    strictParsing = false;
    return this;
  }

  /**

    int destIndex = 0;
    int unescapedChunkStart = 0;

    while (index < end) {
      int cp = codePointAt(s, index, end);
      if (cp < 0) {
        throw new IllegalArgumentException("Trailing high surrogate at end of input");
      }
      // It is possible for this to return null because nextEscapeIndex() may
      // (for performance reasons) yield some false positives but it must never

  }

  public void testInputFutureToString() throws Throwable {
    assertThat(resultFuture.toString()).contains(inputFuture.toString());
  }

  /**
   * Override to return a chaining listenableFuture that returns the result of getSuccessfulResult()
   * when inputFuture returns VALID_INPUT_DATA, and sets the exception to EXCEPTION in all other
   * cases.
   */