.anyMatch(ci -> ci.isDeclarableByExtension());
        }
    }

    interface VariantVisitor {
        // This configuration as a variant. May not always be present
        void visitOwnVariant(DisplayName displayName, ImmutableAttributes attributes, Collection<? extends PublishArtifact> artifacts);

        // A child variant. May not always be present

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

        Set<OutgoingVariant> variants = new LinkedHashSet<>()
        publications.collectVariants(new ConfigurationInternal.VariantVisitor() {
            @Override
            void visitOwnVariant(DisplayName displayName, ImmutableAttributes attributes, Collection<? extends PublishArtifact> artifacts) {
                variants.add(new OutgoingVariant(displayName, attributes, artifacts))
            }

        ImmutableSet.Builder<LocalVariantMetadata> variantsBuilder = ImmutableSet.builder();
        configuration.collectVariants(new ConfigurationInternal.VariantVisitor() {
            @Override
            public void visitOwnVariant(DisplayName displayName, ImmutableAttributes attributes, Collection<? extends PublishArtifact> artifacts) {