*/
  @CanIgnoreReturnValue
  public long writeFrom(InputStream input) throws IOException {
    checkNotNull(input);

    try (OutputStream out = openStream()) {
      return ByteStreams.copy(input, out);
    }
  }

  /**
   * A char sink that encodes written characters with a charset and writes resulting bytes to this
   * byte sink.
   */

   *
   * <p>If you need to convert and concatenate several values (possibly even of different types),
   * use a shared {@link java.nio.ByteBuffer} instance, or use {@link
   * com.google.common.io.ByteStreams#newDataOutput()} to get a growable buffer.
   */
  public static byte[] toByteArray(int value) {
    return new byte[] {
      (byte) (value >> 24), (byte) (value >> 16), (byte) (value >> 8), (byte) value
    };

   * 0x18, 0x19}}.
   *
   * <p>If you need to convert and concatenate several values (possibly even of different types),
   * use a shared {@link java.nio.ByteBuffer} instance, or use {@link
   * com.google.common.io.ByteStreams#newDataOutput()} to get a growable buffer.
   */
  public static byte[] toByteArray(long value) {
    // Note that this code needs to stay compatible with GWT, which has known

      }

      return attrs.size();
    }

    @Override
    public byte[] read() throws IOException {
      try (SeekableByteChannel channel = Files.newByteChannel(path, options)) {
        return ByteStreams.toByteArray(Channels.newInputStream(channel), channel.size());
      }
    }

    @Override
    public CharSource asCharSource(Charset charset) {
      if (options.length == 0) {

      }

      return attrs.size();
    }

    @Override
    public byte[] read() throws IOException {
      try (SeekableByteChannel channel = Files.newByteChannel(path, options)) {
        return ByteStreams.toByteArray(Channels.newInputStream(channel), channel.size());
      }
    }

    @Override
    public CharSource asCharSource(Charset charset) {
      if (options.length == 0) {