when:
        def gradleProjects = getGradleProjectsWithProjectConnectionUsingBuildModel(rootMulti, modelType)

        then:
        gradleProjects.size() == 3
        hasParentProject(gradleProjects, rootMulti, ':', 'B', [':x', ':y'])
        hasChildProject(gradleProjects, rootMulti, ':x', 'x', ':')
        hasChildProject(gradleProjects, rootMulti, ':y', 'y', ':')

        where:

    private Set<Integer> transitiveClassIds = new HashSet<>()

    List<Integer> getChildProjectIds(Integer parentProjectId) {
        return parentToChildProjectIds.get(parentProjectId)
    }

    boolean hasParentProject(Integer childProjectId) {
        if (childProjectId == null) {
            return false
        }
        for (def childLists : parentToChildProjectIds.values()) {
            if (childLists.contains(childProjectId)) {