* little-endian byte order.
   *
   * @return the next eight bytes of the input stream, interpreted as a {@code double} in
   *     little-endian byte order
   * @throws IOException if an I/O error occurs
   */
  @CanIgnoreReturnValue // to skip some bytes
  @Override
  public double readDouble() throws IOException {

  @Override
  long readLong();

  @CanIgnoreReturnValue // to skip some bytes
  @Override
  float readFloat();

  @CanIgnoreReturnValue // to skip some bytes
  @Override
  double readDouble();

  @CanIgnoreReturnValue // to skip a line
  @Override
  @Nullable String readLine();

  @CanIgnoreReturnValue // to skip a field
  @Override
  String readUTF();

    assertEquals("Herby Derby", in.readUTF());
    assertEquals(0xBEBAFECA, Float.floatToIntBits(in.readFloat()));
    assertEquals(0xBEBAFECAEFBEADDEL, Double.doubleToLongBits(in.readDouble()));
  }

  public void testSkipBytes() throws IOException {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    DataOutputStream out = new DataOutputStream(baos);

  }

  /** Reconstitutes the instance from a stream (that is, deserializes it). */
  private void readObject(ObjectInputStream s) throws IOException, ClassNotFoundException {
    s.defaultReadObject();

    set(s.readDouble());
  }