parent2.collectAncestorsStrictVersions([parent2Edge])
        child.collectAncestorsStrictVersions([edge1, edge2])

        then:
        child.ancestorsStrictVersionConstraints.getModules() == moduleSet('a', 'b')
        parent1.ancestorsStrictVersionConstraints == root.ownStrictVersionConstraints
        parent2.ancestorsStrictVersionConstraints == root.ownStrictVersionConstraints
    }

    ModuleIdSetExclude moduleIdSet(Set<ModuleIdentifier> modules);

    GroupSetExclude groupSet(Set<String> groups);

    ModuleSetExclude moduleSet(Set<String> modules);

    default ExcludeSpec fromUnion(Set<ExcludeSpec> remainder) {
        if (remainder.isEmpty()) {
            // It's an intersection, and this method is always called on the remainder

                return factory.nothing();
            }
            if (modules.size() == 1) {
                return factory.module(modules.iterator().next());
            }
            return factory.moduleSet(modules);
        }
    }

    @NonNullApi
    private static final class IntersectModuleSetWithGroupSet extends AbstractIntersection<ModuleSetExclude, GroupSetExclude> {

		name                   string
		initialCachedModules   map[moduleKey]cacheEntry
		initialCachedChecksums map[string]*checksumEntry
		fetchURL               string
		purgeInterval          time.Duration
		wasmModuleExpiry       time.Duration
		checkPurgeTimeout      time.Duration
		getOptions             GetOptions
		wantCachedModules      map[moduleKey]*cacheEntry
		wantCachedChecksums    map[string]*checksumEntry

	resourceVersionByResource map[string]string
}

type moduleKey struct {
	// Identifier for the module. It should be neutral for the checksum.
	// e.g.) oci://docker.io/test@sha256:0123456789 is not allowed.
	//       oci://docker.io/test:latest (tagged form) is allowed.
	name     string
	checksum string
}

type cacheKey struct {
	moduleKey
	downloadURL string

        def moduleE = mavenHttpRepo.module(GROUP_ID, 'e', VERSION).dependsOn(moduleB).dependsOn(moduleC).publish()

        buildFile << """
            ${mavenRepository(mavenHttpRepo)}
            ${customConfigDependencyAssignment(moduleD, moduleE)}
            ${configSyncTask()}
        """

        when:
        moduleD.pom.expectGet()
        moduleE.pom.expectGet()