}
    }

    /**
     * Check if this context is closed
     *
     * @return true if closed, false otherwise
     */
    public boolean isClosed() {
        return closed;
    }

import java.util.stream.Stream;

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

      return (lowerEndpoint.compareTo(upperEndpoint) <= 0)
          ? ContiguousSet.create(Range.closed(lowerEndpoint, upperEndpoint), domain)
          : new EmptyContiguousSet<C>(domain);
    }
  }

  @Override
  public Range<C> range() {
    return range(CLOSED, CLOSED);
  }

  @Override
  public Range<C> range(BoundType lowerBoundType, BoundType upperBoundType) {

  }

  private WeakReference<ClosingFuture<String>> leakClosingFuture(TestCloseable closeable) {
    ClosingFuture<String> willCloseCloseable =
        ClosingFuture.submit(
            closer -> {
              closer.eventuallyClose(closeable, directExecutor());
              return "";
            },
            directExecutor());
    return new WeakReference<>(willCloseCloseable);
  }

  }

  private WeakReference<ClosingFuture<String>> leakClosingFuture(TestCloseable closeable) {
    ClosingFuture<String> willCloseCloseable =
        ClosingFuture.submit(
            closer -> {
              closer.eventuallyClose(closeable, directExecutor());
              return "";
            },
            directExecutor());
    return new WeakReference<>(willCloseCloseable);
  }

        // Act
        raf.open();

        // Assert: open() ensures handle and closes it via try-with-resources
        verify(raf, times(1)).ensureOpen();
        verify(fh, times(1)).close();
    }

    @Test
    @DisplayName("close(): clears cache and closes handle; does not close shared SmbFile")
    void close_sharedFile_closesHandle_only() throws Exception {

            logger.warn("clientConnectionManager is null.");
            return;
        }

        try {
            // Close expired connections
            clientConnectionManager.closeExpiredConnections();
            // Close idle connections
            clientConnectionManager.closeIdleConnections(idleConnectionTimeout, TimeUnit.MILLISECONDS);
        } catch (final Exception e) {

        this.eventQueue = new ArrayBlockingQueue<>(queueSize);
        this.closed = new AtomicBoolean(false);
        this.updater = new Thread(this::feedConsumer, "simplex-transfer-listener");
        updater.setDaemon(true);
        updater.start();
    }

    @Override
    public void close() {
        if (closed.compareAndSet(false, true)) {
            updater.interrupt();
        }
    }

        @DisplayName("close() closes handle; does not close file when not unshared")
        void closeClosesHandle() throws Exception {
            SmbFileInputStream in = newStream();
            in.close();
            verify(mockHandle, times(1)).close();
            verify(mockFile, never()).close();
        }

        @Test
        @DisplayName("seToIoe maps Interrupted cause to InterruptedIOException")

    flush();
  }

  @Override
  public void write(String str, int off, int len) throws IOException {
    super.write(str, off, len);
    flush();
  }

  public boolean closed() {
    return out.closed();
  }