assertEquals(STRING, sink.getString());
  }

  public void testWriteFromStream_doesNotCloseThatStream() throws IOException {
    TestReader in = new TestReader();
    assertFalse(in.closed());
    sink.writeFrom(in);
    assertFalse(in.closed());
  }

  public void testWriteLines_withSpecificSeparator() throws IOException {
    sink.writeLines(ImmutableList.of("foo", "bar", "baz"), "\n");

    assertEquals(Integer.MAX_VALUE, ms.headMultiset("b", CLOSED).size());
    assertEquals(Integer.MAX_VALUE, ms.headMultiset("a", CLOSED).size());

    assertEquals(3, ms.tailMultiset("c", CLOSED).size());
    assertEquals(Integer.MAX_VALUE, ms.tailMultiset("b", CLOSED).size());
    assertEquals(Integer.MAX_VALUE, ms.tailMultiset("a", CLOSED).size());
  }

  @J2ktIncompatible

// and it is flake-prone to check for closure after calling it, this retries for a bit to make
// sure the netns is closed eventually.
func assertNSClosed(t *testing.T, closed *atomic.Bool) {
	for i := 0; i < 5; i++ {
		if closed.Load() {
			return
		}
		time.Sleep(1 * time.Second)
	}
	t.Fatal("NS not closed")

    this.withLock {
      cancel = !source.finished && source.closed && (sink.finished || sink.closed)
      open = isOpen
    }
    if (cancel) {
      // RST this stream to prevent additional data from being sent. This is safe because the input
      // stream is closed (we won't use any further bytes) and the output stream is either finished
      // or closed (so RSTing both streams doesn't cause harm).

            It will be closed in 14 days if no further activity occurs.
            If you don't want the stale bot to close it, then set a milestone for it.
          days-before-pr-close: 14
          close-pr-message: >

    throwIf(OPEN_THROWS);
  }

  public boolean closed() {
    return closed;
  }

  @Override
  public void write(byte[] b, int off, int len) throws IOException {
    throwIf(closed);
    throwIf(WRITE_THROWS);
    super.write(b, off, len);
  }

  @Override
  public void write(int b) throws IOException {
    throwIf(closed);
    throwIf(WRITE_THROWS);
    super.write(b);
  }

func (m *muxClient) doPing(respHandler chan<- Response) (ok bool) {
	m.respMu.Lock()
	if m.closed {
		m.respMu.Unlock()
		// Already closed. This is not an error state;
		// we may just be delivering the last responses.
		return true
	}

	// Only check ping when not closed.
	if got := time.Since(time.Unix(0, atomic.LoadInt64(&m.LastPong))); got > m.clientPingInterval*2 {
		m.respMu.Unlock()

import java.nio.charset.Charset;

/**
 * A destination to which bytes can be written, such as a file. Unlike an {@link OutputStream}, a
 * {@code ByteSink} is not an open, stateful stream that can be written to and closed. Instead, it
 * is an immutable <i>supplier</i> of {@code OutputStream} instances.
 *
 * <p>{@code ByteSink} provides two kinds of methods:
 *
 * <ul>

    check(!closed) { "cache is closed" }
  }

  /** Force buffered operations to the filesystem. */
  @Synchronized
  @Throws(IOException::class)
  override fun flush() {
    if (!initialized) return

    checkNotClosed()
    trimToSize()
    journalWriter!!.flush()
  }

  @Synchronized fun isClosed(): Boolean = closed

      return multiset().subMultiset(fromElement, CLOSED, toElement, OPEN).elementSet();
    }

    @Override
    public SortedSet<E> headSet(@ParametricNullness E toElement) {
      return multiset().headMultiset(toElement, OPEN).elementSet();
    }

    @Override
    public SortedSet<E> tailSet(@ParametricNullness E fromElement) {
      return multiset().tailMultiset(fromElement, CLOSED).elementSet();
    }

    @Override