checkNotNull(keyFunction);
    checkNotNull(valueFunction);
    return Collector.of(
        () ->
            new EnumMapAccumulator<K, V>(
                (v1, v2) -> {
                  throw new IllegalArgumentException("Multiple values for key: " + v1 + ", " + v2);
                }),
        (accum, t) -> {
          /*

  // creation cost.
  @CanIgnoreReturnValue
  static Object checkElementNotNull(@Nullable Object element, int index) {
    if (element == null) {
      throw new NullPointerException("at index " + index);
    }
    return element;
  }

        requestData.setUrl(url);
        return requestData;
    }

    /**
     * Closes the response data, deleting temporary files if any.
     * @throws IOException if an I/O error occurs.
     */
    @Override
    public void close() throws IOException {
        if (isTemporaryFile) {
            FileUtil.deleteInBackground(responseBodyFile);
        }
    }

            method.setAccessible(true);
            return (String[]) method.invoke(null, (Object) values);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    void testConstructorWithInvalidInformationLevel() {
        // The exception is thrown during writeParametersWireFormat when mapInformationLevel is called
        Trans2QueryFSInformation trans2 = new Trans2QueryFSInformation(config, 99);
        assertNotNull(trans2);

        // Exception should be thrown when trying to write parameters
        byte[] buffer = new byte[256];

        void testToStringWithNullFileId() throws Exception {
            // Set oplockLevel but leave fileId as null
            Field oplockLevelField = Smb2OplockBreakNotification.class.getDeclaredField("oplockLevel");
            oplockLevelField.setAccessible(true);
            oplockLevelField.set(notification, (byte) 0x01);

            // The implementation calls Hexdump.toHexString which throws NPE on null

        try {
            rateLimiter.checkAttempt(username, ip);
            fail("Should throw SmbException for locked account");
        } catch (SmbException e) {
            assertTrue(e.getMessage().contains("locked out"), "Should indicate account lockout");
        }
    }

    @Test
    public void testIpRateLimit() throws Exception {
        String ip = "192.168.1.3";

                installArtifact(artifact);
                saveInfo(messages -> messages.addSuccessInstallPlugin(GLOBAL, artifact.getFileName()));
            }
        } catch (final ValidationErrorException e) {
            throw e;
        } catch (final Exception e) {
            throwValidationError(messages -> messages.addErrorsFailedToInstallPlugin(GLOBAL, form.id), this::asListHtml);
        }
        return redirect(getClass());
    }

    @Override
    public void setUp() throws Exception {
        super.setUp();
        generator = new CommandGenerator();
    }

    // Basic setter tests
    public void test_setCommandTimeout() throws Exception {
        final long timeout = 5000L;
        generator.setCommandTimeout(timeout);
        assertTrue(true);
    }

    public void test_setCommandDestroyTimeout() throws Exception {

            return true;
        }

        @Override
        public void process(HttpServletRequest request, HttpServletResponse response, FilterChain chain)
                throws IOException, ServletException {
            throw new ServletException("Test error");
        }
    }

    private static class StatusCodeWebApiManager implements WebApiManager {
        private final int statusCode;