return this.defaultCredentials;
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.CIFSContext#close()
     */
    @Override
    public boolean close() throws CIFSException {
        boolean inUse = super.close();
        inUse |= this.transportPool.close();
        return inUse;
    }

    }

    /**
     * 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);
            }
        });
    }

     * <p>
     * If {@link JarFile#close()} throws an exception, an error message is logged. The exception is not re-thrown.
     * </p>
     *
     * @param jarFile the JAR file (must not be {@literal null})
     */
    public static void close(final JarFile jarFile) {
        assertArgumentNotNull("jarFile", jarFile);

        try {
            jarFile.close();
        } catch (final IOException e) {

    if (hasErrors) {
      return
    }
    try {
      super.flush()
    } catch (e: IOException) {
      hasErrors = true
      onException(e)
    }
  }

  override fun close() {
    try {
      super.close()
    } catch (e: IOException) {
      hasErrors = true
      onException(e)
    }
  }

from contextlib import AsyncExitStack

from starlette.types import ASGIApp, Receive, Scope, Send


# Used mainly to close files after the request is done, dependencies are closed
# in their own AsyncExitStack
class AsyncExitStackMiddleware:
    def __init__(
        self, app: ASGIApp, context_name: str = "fastapi_middleware_astack"
    ) -> None:
        self.app = app
        self.context_name = context_name

    /**
     * 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.
     * @return The CrawlerClient instance.
     */

                fos = null; // Successfully wrapped, no need to close explicitly
            } catch (final Exception e) {
                if (fos != null) {
                    try {
                        fos.close();
                    } catch (final IOException ioe) {
                        // Ignore close exception
                    }
                }
                if (newFile != null) {

                }
                return delegate.read(cbuf, off, len);
            }

            @Override
            public void close() throws IOException {
                if (delegate != null) {
                    delegate.close();
                }
            }
        };
        this.lock = this.in;
    }

    private Reader transform(Reader in) throws IOException {

        throw IOException(npe)
      }
    }
  }

  /**
   * Does all the work to build an HTTPS connection over a proxy tunnel. The catch here is that a
   * proxy server can issue an auth challenge and then close the connection.
   *
   * @return the next plan to attempt, or null if no further attempt should be made either because
   *     we've successfully connected or because no further attempts should be made.
   */

                doClose();
            } catch (final CIFSException e1) {
                log.debug("Failed to close enum", e);
            }
        }
        return n;
    }

    /**
     * {@inheritDoc}
     *
     * @see java.lang.AutoCloseable#close()
     */
    @Override
    public void close() throws CIFSException {
        if (this.next != null) {
            doClose();
        }
    }