import org.gradle.model.Unmanaged

            @Managed
            interface ManagedType {
                @Unmanaged
                $type getUnmanagedReadWriteProperty()

                void setUnmanagedReadWriteProperty($type type)
            }

        """

        then:
        realize(clazz)

        where:
        type << ['List<Date>', 'Set<Date>']

    }