*/
    public static int copy(final URL in, final OutputStream out) {
        assertArgumentNotNull("in", in);
        assertArgumentNotNull("out", out);

        final InputStream is = URLUtil.openStream(in);
        try {
            if (out instanceof FileOutputStream) {
                return copyInternal(wrap(is), (FileOutputStream) out);
            }
            return copyInternal(wrap(is), wrap(out));

    memory = new MemoryOutput();
    out = memory;

    if (resetOnFinalize) {
      source =
          new ByteSource() {
            @Override
            public InputStream openStream() throws IOException {
              return openInputStream();
            }

            @SuppressWarnings("removal") // b/260137033
            @Override
            protected void finalize() {

    // Slice it starting at offset 10.
    ByteSource slice = source.slice(10, 5);

    // Open a stream to the slice.
    InputStream in = slice.openStream();

    // Append 10 more bytes to the source.
    source.append(newPreFilledByteArray(5, 10));

    // The stream reports no bytes... importantly, it doesn't read the byte at index 5 when it

        this.url = Objects.requireNonNull(url, "url cannot be null");
        this.hashCode = Objects.hashCode(url);
    }

    @Override
    public InputStream getInputStream() throws IOException {
        return url.openStream();
    }

    @Override
    public String getLocation() {
        return url.toString();
    }

    /**
     * Gets the URL of this source.
     *

    // read the first 8 chars manually, since there's no equivalent to ByteSource.slice
    // TODO(cgdecker): Add CharSource.slice?
    StringBuilder builder = new StringBuilder();
    Reader reader = concatenated.openStream(); // no need to worry about closing
    for (int i = 0; i < 8; i++) {
      builder.append((char) reader.read());
    }
    assertEquals(expected, builder.toString());
  }

     *
     * @return a byte stream to the source contents, never {@code null}
     * @throws IOException in case of IO issue
     */
    @Nonnull
    InputStream openStream() throws IOException;

    /**
     * Provides a user-friendly hint about the location of the source.
     * This could be a local file path, a URI or just an empty string.

    // read the first 8 chars manually, since there's no equivalent to ByteSource.slice
    // TODO(cgdecker): Add CharSource.slice?
    StringBuilder builder = new StringBuilder();
    Reader reader = concatenated.openStream(); // no need to worry about closing
    for (int i = 0; i < 8; i++) {
      builder.append((char) reader.read());
    }
    assertEquals(expected, builder.toString());
  }

        MappedToolchainsSource(Source source) {
            this.source = source;
        }

        @Override
        public InputStream getInputStream() throws IOException {
            return source.openStream();
        }

        @Override
        public String getLocation() {
            return source.getLocation();
        }
    }

        SourceWrapper(Source source) {
            this.source = source;
        }

        @Override
        public InputStream getInputStream() throws IOException {
            return source.openStream();
        }

        @Override
        public String getLocation() {
            return source.getLocation();
        }

        @Override

        MappedSettingsSource(Source source) {
            this.source = source;
        }

        @Override
        public InputStream getInputStream() throws IOException {
            return source.openStream();
        }

        @Override
        public String getLocation() {
            return source.getLocation();
        }
    }