@Override
      public void write(int c) throws IOException {
        separatingAppendable.append((char) c);
      }

      @Override
      public void write(char[] chars, int off, int len) throws IOException {
        throw new UnsupportedOperationException();
      }

      @Override
      public void flush() throws IOException {
        delegate.flush();
      }

      @Override

     * If an error occurs during file deletion, it is logged but not thrown to avoid
     * masking exceptions from the main operation.
     *
     * @throws IOException if an I/O error occurs during stream closure
     */
    @Override
    public void close() throws IOException {
        try {
            super.close();
        } finally {
            if (!isInMemory() && !done) {

   *
   * @throws UnsupportedOperationException always
   * @deprecated Unsupported operation.
   */
  @CanIgnoreReturnValue
  @Deprecated
  @Override
  public final @Nullable V remove(@Nullable Object o) {
    throw new UnsupportedOperationException();
  }

  /**
   * Guaranteed to throw an exception and leave the map unmodified.
   *

  }

  public void testCopyTo_appendable() throws IOException {
    StringBuilder builder = new StringBuilder();

    assertEquals(STRING.length(), source.copyTo(builder));
    assertTrue(source.wasStreamOpened() && source.wasStreamClosed());

    assertThat(builder.toString()).isEqualTo(STRING);
  }

  public void testCopyTo_charSink() throws IOException {
    TestCharSink sink = new TestCharSink();

  }

  public void testToString() throws Exception {
    Service a = new NoOpService();
    Service b = new FailStartService();
    ServiceManager manager = new ServiceManager(asList(a, b));
    String toString = manager.toString();
    assertThat(toString).contains("NoOpService");
    assertThat(toString).contains("FailStartService");
  }

  public void testTimeouts() throws Exception {

     * @param argValue
     *            The value of the argument.
     * @throws NullArgumentException
     *             If the argument is <code>null</code>.
     */
    public static void assertArgumentNotNull(final String argName, final Object argValue) {
        if (argValue == null) {
            throw new NullArgumentException(argName);
        }
    }

    /**

    @CanIgnoreReturnValue
    @Override
    @ParametricNullness
    public final V get() throws InterruptedException, ExecutionException {
      return super.get();
    }

    @CanIgnoreReturnValue
    @Override
    @ParametricNullness
    public final V get(long timeout, TimeUnit unit)
        throws InterruptedException, ExecutionException, TimeoutException {
      return super.get(timeout, unit);
    }

   * that this throws different exception types, and throws an exception if {@code null} would be
   * returned).
   *
   * @param position position of the element to return
   * @return the element at the specified position in this fluent iterable
   * @throws IndexOutOfBoundsException if {@code position} is negative or greater than or equal to

   * that this throws different exception types, and throws an exception if {@code null} would be
   * returned).
   *
   * @param position position of the element to return
   * @return the element at the specified position in this fluent iterable
   * @throws IndexOutOfBoundsException if {@code position} is negative or greater than or equal to

  @DoNotCall("Always throws UnsupportedOperationException")
  public void addAll(RangeSet<C> other) {
    throw new UnsupportedOperationException();
  }

  /**
   * Guaranteed to throw an exception and leave the {@code RangeSet} unmodified.
   *
   * @throws UnsupportedOperationException always
   * @deprecated Unsupported operation.
   */
  @Deprecated
  @Override
  @DoNotCall("Always throws UnsupportedOperationException")