*            Output stream. Must not be {@literal null}.
     * @param comments
     *            Comments.
     */
    public static void store(final Properties props, final OutputStream out, final String comments) {
        assertArgumentNotNull("props", props);
        assertArgumentNotNull("out", out);

        try {
            props.store(out, comments);
        } catch (final IOException e) {

        final File file = tempFolder.newFile("hoge.properties");
        final FileOutputStream outputStream = OutputStreamUtil.create(file);
        PropertiesUtil.store(outProperties, outputStream, "comments");
        CloseableUtil.close(outputStream);
        final Properties properties = new Properties();
        PropertiesUtil.load(properties, file);
        assertThat(properties.getProperty("a"), is("A"));
    }

    public void store(final OutputStream out, final String comments) throws IOException {
        getProperties().store(out, comments);
    }

    @Override
    public void store(final Writer writer, final String comments) throws IOException {
        getProperties().store(writer, comments);
    }

    @Override
    public void storeToXML(final OutputStream os, final String comment, final String encoding) throws IOException {

    if (supportsRemove) {
      int initialSize = map.size();
      // var oldValue = map.get(keyToRemove);
      map.remove(keyToRemove);
      // This line doesn't hold - see the Javadoc comments above.
      // assertEquals(expectedValue, oldValue);
      assertFalse(map.containsKey(keyToRemove));
      assertEquals(initialSize - 1, map.size());
    } else {

@GwtCompatible
abstract class CollectionFuture<V extends @Nullable Object, C extends @Nullable Object>
    extends AggregateFuture<V, C> {
  /*
   * We access this field racily but safely. For discussion of a similar situation, see the comments
   * on the fields of TimeoutFuture. This field is slightly different from the fields discussed
   * there: cancel() never reads this field, only writes to it. That makes the race here completely

  }

  /*
   * In certain circumstances, this field might theoretically not be visible to an afterDone() call
   * triggered by cancel(). For details, see the comments on the fields of TimeoutFuture.
   *
   * <p>{@code volatile} is required for j2objc transpiling:
   * https://developers.google.com/j2objc/guides/j2objc-memory-model#atomicity
   */

  /** Returns the string representation generated by the delegate's {@code toString} method. */
  @Override
  public String toString() {
    return delegate().toString();
  }

  /* No equals or hashCode. See class comments for details. */

    -1L -> skip(buffer.size) // Exhaust this source.
    else -> skip(newline + 1)
  }
}

/**
 * Reads lines from `IdnaMappingTable.txt`.
 *
 * Comment lines are either blank or start with a `#` character. Lines may also end with a comment.
 * All comments are ignored.
 *
 * Regular lines contain fields separated by semicolons.
 *

    this.predecessor = null;
    this.successor = null;
    return result;
  }

  /*
   * For discussion of the safety of the following methods for operating on predecessors and
   * successors, see the comments near the end of CompactHashMap, noting that the methods here call
   * requirePredecessors() and requireSuccessors(), which are defined at the end of this file.
   */

  private int getPredecessor(int entry) {

  /** Returns the string representation generated by the delegate's {@code toString} method. */
  @Override
  public String toString() {
    return delegate().toString();
  }

  /* No equals or hashCode. See class comments for details. */