def "An LSS can be an element of managed collections"() {
        buildFile << """
        ${registerCustomLanguage()}

        @Managed
        interface BuildType {
            ModelMap<CustomSourceSet> getComponentSources()
            ModelSet<CustomSourceSet> getTestSources()
        }

        class Rules extends RuleSource {
            @Model
            void buildType(BuildType buildType) { }

        buildFile << """
        apply plugin: 'language-base'

        @Managed
        interface BuildType {
            ModelMap<FunctionalSourceSet> getComponentSources()
            ModelSet<FunctionalSourceSet> getTestSources()
        }

        class Rules extends RuleSource {
            @Model
            void buildType(BuildType buildType) { }