}

  /**
   * Parses the specified string as a double-precision floating point value. The ASCII character
   * {@code '-'} (<code>'&#92;u002D'</code>) is recognized as the minus sign.
   *
   * <p>Unlike {@link Double#parseDouble(String)}, this method returns {@code null} instead of
   * throwing an exception if parsing fails. Valid inputs are exactly those accepted by {@link

 * function doing a good job of distributing the elements to the buckets to a distribution not far
 * from uniform), and amortized since some operations can trigger a hash table resize.
 *
 * <p>Unlike {@code java.util.HashMap}, iteration is only proportional to the actual {@code size()},
 * which is optimal, and <i>not</i> the size of the internal hashtable, which could be much larger

    }

    // Check if the parent is a directory first because createDirectories will fail if the parent
    // exists and is a symlink to a directory... we'd like for this to succeed in that case.
    // (I'm kind of surprised that createDirectories would fail in that case; doesn't seem like
    // what you'd want to happen.)
    if (!Files.isDirectory(parent)) {
      Files.createDirectories(parent, attrs);
      if (!Files.isDirectory(parent)) {

  }

  @AndroidIncompatible // b/391667564: crashes from stack overflows
  public void testSetIndirectSelf_toString() {
    SettableFuture<Object> orig = SettableFuture.create();
    // unlike the above this indirection defeats the trivial cycle detection and causes a SOE
    orig.setFuture(
        new ForwardingListenableFuture<Object>() {
          @Override

  }

  private static <E> Iterator<E> asIterator(E... elements) {
    return asList(elements).iterator();
  }

  // In GWT, java.util.TreeSet throws ClassCastException when the comparator
  // throws it, unlike the JDK.  Therefore, we accept ClassCastException as a
  // valid result thrown by java.util.TreeSet#equals.
  private static void assertNotEqualLenient(TreeSet<?> unexpected, SortedSet<?> actual) {
    try {

  /**
   * The host address suitable for use with [InetAddress.getAllByName]. May be:
   *
   *  * A regular host name, like `android.com`.
   *
   *  * An IPv4 address, like `127.0.0.1`.
   *
   *  * An IPv6 address, like `::1`. Note that there are no square braces.
   *
   *  * An encoded IDN, like `xn--n3h.net`.
   *
   * | URL                   | `host()`        |
   * | :-------------------- | :-------------- |

  interface ValueReference<K, V> {
    /** Returns the value. Does not block or throw exceptions. */
    @Nullable V get();

    /**
     * Waits for a value that may still be loading. Unlike get(), this method can block (in the case
     * of FutureValueReference).
     *
     * @throws ExecutionException if the loading thread throws an exception
     * @throws ExecutionError if the loading thread throws an error

	n, err = C.sqrt(-1)
	_, err := C.voidFunc()
	var n, err = C.sqrt(1)

Note that the C errno value may be non-zero, and thus the err result may be
non-nil, even if the function call is successful. Unlike normal Go conventions,
you should first check whether the call succeeded before checking the error
result. For example:

	n, err := C.setenv(key, value, 1)
	if n != 0 {

  interface ValueReference<K, V> {
    /** Returns the value. Does not block or throw exceptions. */
    @Nullable V get();

    /**
     * Waits for a value that may still be loading. Unlike get(), this method can block (in the case
     * of FutureValueReference).
     *
     * @throws ExecutionException if the loading thread throws an exception
     * @throws ExecutionError if the loading thread throws an error

    }

    @Override
    public Set<V> get(@ParametricNullness K key) {
      /*
       * Note that this doesn't return a SortedSet when delegate is a
       * SortedSetMultiset, unlike (SortedSet<V>) super.get().
       */
      return Collections.unmodifiableSet(delegate().get(key));
    }

    @Override
    public Set<Map.Entry<K, V>> entries() {