if (variants == null || variants.isEmpty() || !allArtifactSet.isEmpty()) {
            visitor.visitOwnVariant(displayName, attributes.asImmutable(), allArtifactSet);
        }
        if (variants != null) {
            for (ConfigurationVariantInternal variant : variants.withType(ConfigurationVariantInternal.class)) {

        // Verify Gradle metadata particulars
        assert backingModule.parsedModuleMetadata.variants*.name as Set == ['apiElements', 'runtimeElements'] as Set
        assert backingModule.parsedModuleMetadata.variant('apiElements').files*.name == [backingModule.jarFile.name]
        assert backingModule.parsedModuleMetadata.variant('runtimeElements').files*.name == [backingModule.jarFile.name]
    }

    void assertNotPublished() {

    @Override
    MavenModule variant(String variant, Map<String, String> attributes) {
        createVariant(variant, attributes)
        return this
    }

    @Override
    MavenModule variant(String variant, Map<String, String> attributes, @DelegatesTo(value = VariantMetadataSpec, strategy = Closure.DELEGATE_FIRST) Closure<?> variantConfiguration) {
        def v = createVariant(variant, attributes)

    return VariantBinaryAddFunc(
        cc_ctx, cc_a.scalar<Variant>()(), cc_b.scalar<Variant>()(),
        cc_out->scalar<Variant>().data(), binary_add_func);
  } else {
    binary_add_func(ctx, a, b, out);
    return cc_ctx->status();
  }
}

static Status VariantBinaryAddFunc(
    ::tensorflow::OpKernelContext* cc_ctx, const Variant& a, const Variant& b,
    Variant* out,

                .map(variant -> resolveStateFor(variant).asVariant())
                .collect(Collectors.toList())
        );
        this.idGenerator = idGenerator;
        this.selectableVariantResults = graphMetadata.getVariantsForGraphTraversal().stream()
            .flatMap(variant -> variant.getVariants().stream())
            .map(variant -> new DefaultResolvedVariantResult(
                getId(),

        return conf;
    }

    /**
     * Ensures the target variant matches the request attributes and is consumable. This needs to be called
     * for variants that are selected by means other than attribute matching.
     *
     * Note: This does not need to be called for variants selected via attribute matching, since
     * attribute matching ensures selected variants are compatible with the requested attributes.
     */

    /**
     * Define a variant with attributes. Variants are only published when using {@link #withModuleMetadata()}.
     */
    MavenModule variant(String variant, Map<String, String> attributes)

    /**
     * Define a variant with attributes. Variants are only published when using {@link #withModuleMetadata()}.
     */

        then: "the result should have the variant added by the rule"
        def variantsForGraphTraversal = result.variantsForGraphTraversal
        variantsForGraphTraversal.size() == ownVariants + 1
        def variant = variantsForGraphTraversal.find { it.name == "test" }
        variant != null
        "org.gradle.test" in variant.attributes.keySet().collect { it.name }

        where:

    }

    public List<AssessedCandidate> assessResolvedVariants(List<? extends ResolvedVariant> resolvedVariants) {
        return resolvedVariants.stream()
            .map(variant -> assessCandidate(variant.asDescribable().getCapitalizedDisplayName(), variant.getCapabilities(), variant.getAttributes().asImmutable()))
            .sorted(Comparator.comparing(AssessedCandidate::getDisplayName))
            .collect(Collectors.toList());
    }

====

== Making variants published as classified jars explicit ==

While in the previous example, all variants, "main variants" and optional features, were packaged in one jar file, it is common to publish certain variants as separate files.
In particular, when the variants are mutual exclusive — i.e. they are *not* feature variants, but different variants offering alternative choices.