return null;
        }

        @Override
        public StringBuffer getRequestURL() {
            return null;
        }

        @Override
        public HttpSession getSession(boolean create) {
            return null;
        }

        @Override
        public HttpSession getSession() {
            return null;
        }

        @Override

        }
    }

    private static class TestCorsHandler extends CorsHandler {
        private boolean processCalled = false;
        private String lastOrigin = null;
        private ServletRequest lastRequest = null;
        private ServletResponse lastResponse = null;

        @Override
        public void process(String origin, ServletRequest request, ServletResponse response) {
            processCalled = true;

  private Entry<K, V> presentKeyNullValueEntry;

  @Override
  public void setUp() throws Exception {
    super.setUp();
    nullKeyEntry = entry(null, v3());
    nullValueEntry = entry(k3(), null);
    nullKeyValueEntry = entry(null, null);
    presentKeyNullValueEntry = entry(k0(), null);
  }

  @MapFeature.Require(SUPPORTS_PUT)
  @CollectionSize.Require(absent = ZERO)
  public void testPut_supportedPresent() {

            // Validate inputs
            if (path == null || path.isEmpty() || docMap == null || docMap.isEmpty()) {
                return null;
            }

            Object mimeType = docMap.get("mimetype");
            if (mimeType == null) {
                return null;
            }

            // Create a task tuple

            if (labelValueMap != null) {
                return labelValueMap.get(value);
            }
            return null;
        }).orElse(value);
    }

    /**
     * Converts a Long timestamp to a Date object.
     *
     * @param value the timestamp in milliseconds
     * @return Date object representing the timestamp, or null if value is null
     */

      return;
    }

    map.put(null, unmappedValue);
    assertEquals(unmappedValue, map.get(null));
    assertTrue(map.containsKey(null));
    Entry<@Nullable K, V> entry = mapEntry(null, unmappedValue);
    assertTrue(entrySet.remove(entry));
    assertNull(map.get(null));
    assertFalse(map.containsKey(null));
  }

  public void testEntrySetRemoveNullKeyMissing() {

    checkFromStringCase("google.com:-25", 1, null, 99, false);
    checkFromStringCase("google.com:+25", 1, null, 99, false);
    checkFromStringCase("google.com:25  ", 1, null, 99, false);
    checkFromStringCase("google.com:25\t", 1, null, 99, false);
    checkFromStringCase("google.com:0x25 ", 1, null, 99, false);
  }

  public void testFromStringUnparseableNonsense() {

    checkFromStringCase("google.com:-25", 1, null, 99, false);
    checkFromStringCase("google.com:+25", 1, null, 99, false);
    checkFromStringCase("google.com:25  ", 1, null, 99, false);
    checkFromStringCase("google.com:25\t", 1, null, 99, false);
    checkFromStringCase("google.com:0x25 ", 1, null, 99, false);
  }

  public void testFromStringUnparseableNonsense() {

        final String value = getHttpFileuploadMaxSize();
        return value != null ? DfTypeUtil.toLong(value) : null;
    }

    String getHttpFileuploadThresholdSize();

    default Long getHttpFileuploadThresholdSizeAsLong() {
        final String value = getHttpFileuploadThresholdSize();
        return value != null ? DfTypeUtil.toLong(value) : null;
    }

    String getPasswordInvalidAdminPasswords();

    TestCallable secondCallable = new TestCallable(Futures.<Void>immediateFuture(null));
    @SuppressWarnings({"unused", "nullness"})
    Future<?> possiblyIgnoredError1 = serializer.submitAsync(secondCallable, directExecutor());
    assertThat(firstCallable.called).isTrue();
    assertThat(secondCallable.called).isFalse();
    firstFuture.set(null);
    assertThat(secondCallable.called).isTrue();
  }