if (!Collection.class.isAssignableFrom(parameterTypes[index]) || !isParameterized(index)) {
            return null;
        }
        final ParameterizedClassDesc pcd = parameterizedClassDescs[index].getArguments()[0];
        if (pcd == null) {
            return null;
        }
        return pcd.getRawClass();
    }

    @Override
    public Class<?> getKeyClassOfMap(final int index) {

        exception.expect(NullArgumentException.class);
        exception.expectMessage(is("[ECL0008]argument[props] is null."));
        final InputStream inputStream = ResourceUtil.getResourceAsStream("org/codelibs/core/io/test.properties");
        PropertiesUtil.load(null, inputStream);
    }

    /**
     * Test method for

    get() = methodInfo.getAttribute(SyntheticAttribute.tag) != null


internal
val MemberValue.intValue: Int
    get() {
        var value: Int? = null
        accept(object : MemberValueVisitorAdapter() {
            override fun visitIntegerMemberValue(node: IntegerMemberValue) {
                value = node.value
            }
        })
        if (value == null) throw annotationMemberValueNotFound(typeOf<Int>())

     *
     * @param groupId the group identifier, or {@code null} is unspecified
     * @param artifactId the artifact identifier, or {@code null} is unspecified
     * @param version the artifact version, or {@code null} is unspecified
     * @param classifier the artifact classifier, or {@code null} is unspecified
     * @param extension the artifact extension, or {@code null} is unspecified

        return new CopyOptions().exclude(propertyNames);
    }

    /**
     * Returns a {@link CopyOptions} that excludes properties with {@literal null} values from the operation.
     *
     * @return A {@link CopyOptions} that excludes properties with {@literal null} values from the operation.
     * @see CopyOptions#excludeNull()
     */
    public static CopyOptions excludeNull() {
        return new CopyOptions().excludeNull();

        // Test with null value
        String nullValue = null;
        OptionalEntity<String> emptyOptional = OptionalUtil.ofNullable(nullValue);

        assertFalse(emptyOptional.isPresent());
        assertEquals("default", emptyOptional.orElse("default"));

        // Test that empty optional returns null instead of throwing
        assertNull(emptyOptional.orElse(null));
    }

    @Test

        .isEqualTo("5 + 6 = 11");
    assertThat(Strings.lenientFormat("%s", null, null, null)).isEqualTo("null [null, null]");
    assertThat(Strings.lenientFormat(null, 5, 6)).isEqualTo("null [5, 6]");
    assertThat(Strings.lenientFormat("%s", (Object) null)).isEqualTo("null");
  }

  @J2ktIncompatible // TODO(b/319404022): Allow passing null array as varargs
  public void testLenientFormat_nullArrayVarargs() {

    }

    @Test
    public void test_changePassword_withBothNull() {
        // Test password change with both null
        testLdapManager.changePasswordResult = false;
        testFessConfig.ldapAdminSyncPassword = false;

        boolean result = ldapChain.changePassword(null, null);

        assertTrue(result);
        assertNull(testLdapManager.changePasswordUsername);

                }
                return null;
            }

            @Override
            public LaunchedProcess launchNow(final LaunchNowOpCall opLambda) {
                if (withParamsCallback != null) {
                    return withParamsCallback.call(opLambda);
                }
                return null;
            }
        };

        final JobManager mockJobManager = new JobManager() {

     */
    public void setMessages(final List<ChatMessage> messages) {
        synchronized (messagesLock) {
            if (messages == null) {
                this.messages = null;
            } else if (messages instanceof CopyOnWriteArrayList) {
                this.messages = messages;
            } else {
                this.messages = new CopyOnWriteArrayList<>(messages);
            }
        }