* CharStreams} method returns a singleton writer whose {@code close} method has no effect, while
   * the {@link Writer#nullWriter()} method returns a new instance whose methods throw after the
   * instance is {@link Writer#close() closed}.
   *
   * @since 15.0
   */
  public static Writer nullWriter() {
    return NullWriter.INSTANCE;
  }

          .build(),
      )

    val exception =
      assertFailsWith<IOException> {
        call2.execute()
      }
    assertThat(exception.message).isIn("Socket closed", "Socket is closed")
  }

        this.clientMap = clientMap;
    }

    /**
     * Closes all clients in the factory.
     */
    @Override
    public void close() {
        clientMap.values().stream().distinct().forEach(client -> {
            try {
                client.close();
            } catch (final Exception e) {
                logger.warn("Failed to close {}.", client.getClass().getCanonicalName(), e);
            }
        });

    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();

    assertTrue(source.wasStreamClosed());
    assertEquals(STRING, writer.toString());
  }

  public void testLines() throws IOException {
    source = new TestCharSource(LINES);

	ForceUnlock(ctx context.Context, args LockArgs) (bool, error)

	// Returns underlying endpoint of this lock client instance.
	String() string

	// Close closes any underlying connection to the service endpoint
	Close() error

	// Is the underlying connection online? (is always true for any local lockers)
	IsOnline() bool

	// Is the underlying locker local to this server?
	IsLocal() bool

            }
        }
    }

    /**
     * Closes the underlying CrawlerClient and releases any resources associated with it.
     *
     * @throws Exception if an error occurs during the close operation
     */
    @Override
    public void close() throws Exception {
        client.close();
    }

    /**
     * Returns the underlying CrawlerClient.

		// shutdown in progress
		return http.ErrServerClosed
	}

	// Close underneath HTTP listener.
	srv.listenerMutex.Lock()
	err := srv.listener.Close()
	srv.listenerMutex.Unlock()
	if err != nil {
		return err
	}

	// Wait for opened connection to be closed up to Shutdown timeout.
	return nil
}

// UseIdleTimeout configure idle connection timeout

    }

    /**
     * Closes the Zip file.
     * <p>
     * If {@link ZipFile#close()} throws an exception, an error message is logged. The exception is not rethrown.
     * </p>
     *
     * @param zipFile
     *            Zip file. Must not be {@literal null}.
     */
    public static void close(final ZipFile zipFile) {
        assertArgumentNotNull("zipFile", zipFile);

    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();

    assertTrue(source.wasStreamClosed());
    assertEquals(STRING, writer.toString());
  }

  public void testLines() throws IOException {
    source = new TestCharSource(LINES);

    }
  }

  @Test fun closeReservedSetThrows() {
    data.write("880203ec".decodeHex()) // Close with code 1004
    data.write("880203ed".decodeHex()) // Close with code 1005
    data.write("880203ee".decodeHex()) // Close with code 1006
    for (i in 1015..2999) {
      data.write(("8802" + format("%04X", i)).decodeHex()) // Close with code 'i'
    }
    var count = 0
    while (!data.exhausted()) {