Iterable<? extends CharSource> list = ImmutableList.of(source, source);
    Reader joinedReader = CharSource.concat(list).openStream();

    assertTrue(joinedReader.ready());
    assertEquals('a', joinedReader.read());
    assertEquals('a', joinedReader.read());
    assertEquals(-1, joinedReader.read());
    assertFalse(joinedReader.ready());
  }

  public void testSimple() throws Exception {

        return () -> new LineIterator(reader);
    }

    /**
     * Constructs an instance.
     *
     * @param reader
     *            The {@link Reader} to read strings from. Must not be {@literal null}.
     */
    public LineIterator(final Reader reader) {
        assertArgumentNotNull("reader", reader);
        this.reader = new BufferedReader(reader);
    }

    /**

  }

  public void testOpenStream() throws IOException {
    Reader reader = source.openStream();

    StringWriter writer = new StringWriter();
    char[] buf = new char[64];
    int read;
    while ((read = reader.read(buf)) != -1) {
      writer.write(buf, 0, read);
    }
    reader.close();
    writer.close();

    assertExpectedString(writer.toString());
  }

      Java8Compatibility.clear(cbuf);
      // The default implementation of Reader#read(CharBuffer) allocates a
      // temporary char[], so we call Reader#read(char[], int, int) instead.
      int read = (reader != null) ? reader.read(buf, 0, buf.length) : readable.read(cbuf);
      if (read == -1) {
        lineBuf.finish();
        break;
      }
      lineBuf.add(buf, 0, read);
    }
    return lines.poll();
  }

    }

    @Nonnull
    default T read(@Nonnull InputStream input, boolean strict) throws XmlReaderException {
        return read(XmlReaderRequest.builder().inputStream(input).strict(strict).build());
    }

    @Nonnull
    default T read(@Nonnull Reader reader) throws XmlReaderException {
        return read(reader, true);
    }

    @Nonnull

type recordTransform struct {
	reader io.Reader
	// recordDelimiter can be up to 2 characters.
	recordDelimiter []byte
	oneByte         []byte
	useOneByte      bool
}

func (rr *recordTransform) Read(p []byte) (n int, err error) {
	if rr.useOneByte {
		p[0] = rr.oneByte[0]
		rr.useOneByte = false
		n, err = rr.reader.Read(p[1:])
		n++
	} else {
		n, err = rr.reader.Read(p)
	}

	if err != nil {

     */
    public static String readText(final Reader reader) {
        assertArgumentNotNull("reader", reader);

        final StringBuilder buf = new StringBuilder(BUF_SIZE);
        CopyUtil.copy(reader, buf);
        return new String(buf);
    }

     */
    public PersistedToolchains read(Reader reader) throws IOException, XmlPullParserException {
        return read(reader, true);
    }

    /**
     * Method read.
     *
     * @param in a in object.
     * @param strict a strict object.
     * @return PersistedToolchains
     * @throws IOException IOException if any.
     * @throws XmlPullParserException XmlPullParserException if
     *         any.

      }

      override fun fromDer(reader: DerReader): Any? {
        if (isOptional && !reader.hasNext()) return optionalValue

        val peekedHeader =
          reader.peekHeader()
            ?: throw ProtocolException("expected a value at $reader")
        for ((_, adapter) in choices) {
          if (adapter.matches(peekedHeader)) {
            return adapter.fromDer(reader)
          }
        }

    }

    public Settings read(Reader reader, boolean strict) throws IOException, XmlPullParserException {
        try {
            return new Settings(delegate.read(reader, strict, null));
        } catch (XMLStreamException e) {
            throw new XmlPullParserException(e.getMessage(), null, e);
        }
    }

    public Settings read(Reader reader) throws IOException, XmlPullParserException {
        try {