throw new IOException("Unable to update modification time of " + file);
    }
  }

  /**
   * Creates any necessary but nonexistent parent directories of the specified file. Note that if
   * this operation fails it may have succeeded in creating some (but not all) of the necessary
   * parent directories.
   *
   * @throws IOException if an I/O error occurs, or if any necessary but nonexistent parent

   *
   *  * A `SYN_RESET` frame abnormally terminates the stream.
   *  * Both input and output streams have transmitted all data and headers.
   *
   * Note that the input stream may continue to yield data even after a stream reports itself as
   * not open. This is because input data is buffered.
   */
  val isOpen: Boolean
    get() {
      withLock {

  @WeakOuter
  private final class EntrySet extends AbstractMultiset<E>.EntrySet {
    @Override
    ConcurrentHashMultiset<E> multiset() {
      return ConcurrentHashMultiset.this;
    }

    /*
     * Note: the superclass toArray() methods assume that size() gives a correct
     * answer, which ours does not.
     */

    @Override
    public Object[] toArray() {
      return snapshot().toArray();
    }

 *
 * {@snippet :
 * Joiner joiner = Joiner.on("; ").skipNulls();
 *  . . .
 * return joiner.join("Harry", null, "Ron", "Hermione");
 * }
 *
 * <p>This returns the string {@code "Harry; Ron; Hermione"}. Note that all input elements are
 * converted to strings using {@link Object#toString()} before being appended.
 *
 * <p>If neither {@link #skipNulls()} nor {@link #useForNull(String)} is specified, the joining

     */
    protected String algorithm = BLOWFISH;

    /**
     * The transformation to use for the cipher when using Key objects.
     * Default is Blowfish to match the algorithm default.
     * <p>
     * Note: For better security, consider using "AES/GCM/NoPadding" with proper IV handling.
     * </p>
     */
    protected String transformation = BLOWFISH;

    /**
     * The key to use for encryption/decryption.

                return getProperty(SPNEGO_PREAUTH_PASSWORD, "password");
            }
            if (SpnegoHttpFilter.Constants.ALLOW_BASIC.equals(name)) {
                // SECURITY NOTE: Basic authentication is enabled by default for compatibility.
                // For production, consider setting spnego.allow.basic to false.
                return getProperty(SPNEGO_ALLOW_BASIC, "true");
            }

   * NullPointerException if the comparator does. Since our construction
   * methods ensure that null is never present in the map, it's OK for the
   * comparator to look for it wherever it wants.
   *
   * Note that we do NOT touch the comparator returned by comparator(), which
   * should be identical to the one the user passed in. We touch only the
   * "secret" comparator used by the delegate implementation.
   */

        .Builder()
        .name("a")
        .value("b")
        .domain("example.com")
        .sameSite(sameSite)
        .build()
    assertThat(cookie.sameSite).isEqualTo(sameSite)
  }

  /** Note that we permit building a cookie that doesn’t follow the rules. */
  @Test fun builderSameSiteNoneDoesNotRequireSecure() {
    val cookieBuilder =
      Cookie
        .Builder()
        .name("a")

  }

  // We need to test that our method behaves like the JDK method.
  @SuppressWarnings("InlineMeInliner")
  public void testCompare() {
    for (double x : VALUES) {
      for (double y : VALUES) {
        // note: spec requires only that the sign is the same
        assertWithMessage("%s, %s", x, y)
            .that(Doubles.compare(x, y))
            .isEqualTo(Double.compare(x, y));
      }
    }
  }

          Function<? super T, ? extends V> valueFunction) {
    return CollectCollectors.toImmutableBiMap(keyFunction, valueFunction);
  }

  /**
   * Returns the empty bimap.
   *
   * <p><b>Performance note:</b> the instance returned is a singleton.
   */
  // Casting to any type is safe because the set will never hold any elements.
  @SuppressWarnings("unchecked")
  public static <K, V> ImmutableBiMap<K, V> of() {