- [ ] Check ["Allow edit from maintainers" option](https://help.github.com/articles/allowing-changes-to-a-pull-request-branch-created-from-a-fork/) in pull request so that additional changes can be pushed by Gradle team.
- [ ] Provide integration tests (under `<subproject>/src/integTest`) to verify changes from a user perspective.

                    val someVal: String? = null
                    var someVar: String? = null
                    fun foo(): String? = null
                }
            """
        ) {
            assertHasErrors(
                "Method com.example.Source.foo(): From non-null returning to null returning breaking change.",
                "Method com.example.Source.getSomeVal(): From non-null returning to null returning breaking change.",

                def newNullability = newParametersNullability[idx]
                if (oldNullability && !newNullability) {
                    errors << "Parameter $idx from null accepting to non-null accepting breaking change".toString()
                } else if (!oldNullability && newNullability) {
                    warnings << "Parameter $idx nullability changed from non-nullable to nullable".toString()

                if (overriddenProp != null) {
                    for (ExtraAttributeDoc attributeDoc : overriddenProp.getAdditionalValues()) {
                        additionalValues.put(attributeDoc.getKey(), attributeDoc);
                    }
                }
            }

            for (int i = 1; i < header.size(); i++) {
                if (cells.get(i).getFirstChild() == null) {
                    continue;

        _ * javadocConverter.parse(method, !null) >> ({[parse("<para>${args.comment ?: 'comment'}</para>")]} as DocComment)
        return method
    }

    def methodDoc(String name) {
        MethodDoc methodDoc = Mock()
        _ * methodDoc.name >> name
        _ * methodDoc.metaData >> method(name, null)
        _ * methodDoc.forClass(!null) >> methodDoc
        return methodDoc
    }

                @Override
                void method() { }
            }
        """

        then:
        incubatingMissingRule.maybeViolation(jApiType) == null
        sinceMissingRule.maybeViolation(jApiType) == null

        where:
        apiElement | jApiTypeName
        'method'   | 'jApiMethod'
        'field'    | 'jApiField'
    }

    }

    boolean isKnownType(String className) {
        return classMetaData.find(className) != null
    }

    gradlebuild.docs.dsl.docbook.model.ClassDoc findClassDoc(String className) {
        gradlebuild.docs.dsl.docbook.model.ClassDoc classDoc = classes[className]
        if (classDoc == null && getFileForClass(className).isFile()) {
            return getClassDoc(className)
        }
        return classDoc

    @TempDir
    File testDir

    ViolationCheckContext context = new ViolationCheckContext() {
        Map userData = [seenApiChanges: [] as Set]

        String getClassName() { return null }

        Map<String, ?> getUserData() { return userData }

        Object getUserData(String key) {
            return userData[key]
        }

        void putUserData(String key, Object value) {

        this.metaData = propertyMetaData
        id = "${referringClass.className}:$name"
        this.comment = comment
        if (additionalValues == null) {
            throw new NullPointerException("additionalValues constructor var is null for referringClass: $referringClass")
        }
        this.additionalValues = additionalValues
    }

    PropertyDoc forClass(ClassDoc referringClass) {

            String pluginId = mixin.getPluginId();
            ClassExtensionDoc classExtensionDoc = plugins.get(pluginId);
            if (classExtensionDoc == null) {
                classExtensionDoc = new ClassExtensionDoc(pluginId, classDoc);
                plugins.put(pluginId, classExtensionDoc);
            }