Collections.emptyList()
        );

        // It is fine if no graph variants satisfy our request.
        // Variant reselection allows no target variants to be found.
        if (graphVariant == null) {
            return ImmutableSet.of();
        }

        // Next, return all artifact variants for the selected graph variant.
        return getArtifactsForGraphVariant(graphVariant);
    }

    /**

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

        def variantDef = publications.variants.create("child")
        variantDef.attributes.attribute(Attribute.of("thing", String), "value")
        variantDef.artifacts.add(artifact)

        expect:
        def variants = getOutgoingVariants(publications)
        variants.size() == 1

        def child = variants.first()
        child.displayName.displayName == '<config> variant child'

                .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(),

====

== 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.

        The only attribute distinguishing these variants is 'shape'. Add this attribute to the consumer's configuration to resolve the ambiguity:
          - Value: 'round' selects variant: 'blueRoundElements'
          - Value: 'square' selects variant: 'blueSquareElements'
          - Value: 'triangle' selects variant: 'blueTriangleElements'""")

        copy.variants.size() == 3
        copy.variants[0].name == "api"
        copy.variants[0].files.size() == 2
        copy.variants[1].name == "runtime"
        copy.variants[1].files.size() == 1
        copy.variants[2].name == "link"
        copy.variants[2].files.empty

        def immutable3 = copy.asImmutable()
        immutable3.variants.size() == 3
        immutable3.variants[0].name == "api"

        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.
     */

            .stream()
            .flatMap(variant -> variant.prepareForArtifactResolution().getArtifactVariants().stream())
            .map(variant -> new DefaultResolvedVariantResult(
                component.getId(),
                Describables.of(variant.getName()),
                component.getAttributeDesugaring().desugar(variant.getAttributes().asImmutable()),

        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: