@ParametricNullness V value) {
    if (value == null) {
      // This cast is safe because null is assignable to V for all V (i.e. it is bivariant)
      @SuppressWarnings("unchecked")
      ListenableFuture<V> typedNull = (ListenableFuture<V>) ImmediateFuture.NULL;
      return typedNull;
    }
    return new ImmediateFuture<>(value);
  }

  /**

        InetSocketAddress remote = new InetSocketAddress("localhost", 445);
        InetSocketAddress local = null;

        RdmaConnection connection = provider.createConnection(remote, local);
        assertNotNull(connection, "Connection should not be null");
        assertEquals(remote, connection.getRemoteAddress(), "Remote address should match");
    }

    @Test

        assertEquals(expectedStatus, ex.getNtStatus(), "status should map based on code");
        assertNull(ex.getCause(), "cause must be null for int constructor");
        assertNull(ex.getRootCause(), "rootCause must be null for int constructor");
    }

    /**
     * Validate message-only constructor with both null and empty messages.
     */
    @ParameterizedTest
    @MethodSource("messageProvider")

        }

        @Test
        @DisplayName("setOverrideTimeout should handle null value")
        void testSetOverrideTimeoutNull() {
            testRequest.setOverrideTimeout(5000);
            testRequest.setOverrideTimeout(null);
            assertNull(testRequest.getOverrideTimeout());
        }
    }

    @Nested
    @DisplayName("Cancel Request Tests")

            return null;
        }
    }

    private SSLSocketFactory getSSLSocketFactory(CurlHelper curlHelper) {
        try {
            Field field = CurlHelper.class.getDeclaredField("sslSocketFactory");
            field.setAccessible(true);
            return (SSLSocketFactory) field.get(curlHelper);
        } catch (Exception e) {
            return null;
        }
    }

        }

        @Test
        @DisplayName("Should handle null root cause")
        void testConstructorWithNullRootCause() {
            TransportException exception = new TransportException((Throwable) null);

            assertNotNull(exception);
            assertNull(exception.getRootCause());
        }

        @Test
        @DisplayName("Should handle null message with root cause")

    // manually add elements to avoid expansion
    // 1/3 null keys, 1/3 null values
    int originalCount = 1024;
    ReferenceEntry<Object, Object> entry = null;
    for (int i = 0; i < originalCount; i++) {
      Object key = new Object();
      Object value = (i % 3 == 0) ? null : new Object();
      int hash = map.hash(key);
      if (i % 3 == 1) {
        key = null;
      }

    List<@Nullable String> list = newArrayList("a", null, "b", null, "a", null);
    assertEquals(2, frequency(list.iterator(), "a"));
    assertEquals(1, frequency(list.iterator(), "b"));
    assertEquals(0, frequency(list.iterator(), "c"));
    assertEquals(0, frequency(list.iterator(), 4.2));
    assertEquals(3, frequency(list.iterator(), null));
  }

  @GwtIncompatible // slow (~4s)

    }

    public void test_add_nullOrigin() {
        // Setup
        TestCorsHandler handler = new TestCorsHandler("null-origin-handler");

        // Execute
        corsHandlerFactory.add(null, handler);
        CorsHandler result = corsHandlerFactory.get(null);

        // Verify
        assertNotNull(result);
        assertEquals(handler, result);
    }

      codePoint == '%'.code &&
      (!alreadyEncoded || strict && !input.isPercentEncoded(i, limit))
    ) {
      // Percent encode this character.
      if (encodedCharBuffer == null) {
        encodedCharBuffer = Buffer()
      }

      if (charset == null || charset == Charsets.UTF_8) {
        encodedCharBuffer.writeUtf8CodePoint(codePoint)
      } else {