return nothing();
        }
        if (common.size() == 1) {
            return moduleId(common.iterator().next());
        }
        return moduleIdSet(common);
    }

    default ExcludeSpec fromModules(Set<ModuleIdentifier> moduleIds) {
        if (moduleIds.isEmpty()) {
            return nothing();
        }
        if (moduleIds.size() == 1) {
            return moduleId(moduleIds.iterator().next());
        }

        def fromModule = newModule('from')
        def selectedModule = newModule('selected')
        def variant = newVariant("foo")

        when:
        def dep = factory.createResolvedDependency(selector('requested'), fromModule, selectedModule, variant, false)
        def same = factory.createResolvedDependency(selector('requested'), fromModule, selectedModule, variant, false)

        def roModules = getModulesInReadOnlyCache(mavenHttpRepo)
        roModules.each {
            it.withModuleMetadata()
            if (publishJavadocsAndSources) {
                it.withSourceAndJavadoc()
            }
            it.publish()
        }
        def deps = new StringBuilder()
        StringBuilder queries = new StringBuilder()
        roModules.each {
            expectResolve(it)