variant.getFiles(), variant.getCapabilities(), variantToDependencies.get(variant.getName()), variant.isExternalVariant()));
        }
        ImmutableList<AbstractRealisedModuleComponentResolveMetadata.ImmutableRealisedVariantImpl> realisedVariants = builder.build();

    }

    @Override
    public T variant(String variant, Map<String, String> attributes) {
        backingModule.variant(variant, attributes);
        return t();
    }

    @Override
    public T variant(String variant, Map<String, String> attributes, @DelegatesTo(value=VariantMetadataSpec.class, strategy=Closure.DELEGATE_FIRST) Closure<?> variantConfiguration) {
        backingModule.variant(variant, attributes, variantConfiguration);

    @Override
    public Set<? extends SoftwareComponent> getVariants() {
        return variants;
    }

    public void addArtifact(PublishArtifact artifact) {
        artifacts.add(artifact);
    }

    /**
     * Adds a child variant
     */
    public void addVariant(SoftwareComponent variant) {
        variants.add(variant);
    }

        for (SoftwareComponentVariant variant : component.getUsages()) {
            variant.getAttributes().keySet().stream()
                .filter(attribute -> Category.CATEGORY_ATTRIBUTE.getName().equals(attribute.getName()))
                .findFirst()
                .ifPresent(attribute -> {
                    Object value = variant.getAttributes().getAttribute(attribute);

	flag.Parse()

	var variants []Variant
	if *genExp {
		variants = expVariants
	} else if *genGeneric {
		variants = genericVariants
	} else {
		variants = traditionalVariants
	}
	for i := range variants {
		generate(&variants[i])
	}
}

// generate generates the code for variant `v` into a file named by `v.Path`.
func generate(v *Variant) {

 * <p>You can use this interface to associate artifacts with a configuration using the {@link #artifact(Object)} methods. You can also define several variants of the configuration's artifacts. Each variant represents a set of artifacts that form some mutually exclusive usage of the component.</p>
 *
 * <p>An implicit variant is defined for a configuration whenever any artifacts are attached directly to this object or inherited from another configuration.</p>
 *

            return variants;
        }
        ImmutableList.Builder<ComponentVariant> builder = new ImmutableList.Builder<>();
        if (variants != null) {
            builder.addAll(variants);
        }
        for (MutableComponentVariant variant : newVariants) {

image::xctest-task-graph.png[]

[[sec:xctest_task_variants]]
=== Variant-dependent Tasks

The XCTest Plugin creates tasks based on the variants of the test component.
Read the <<building_swift_projects.adoc#sec:introducing_build_variants-swift,introduction to build variants>> for more information.
The following diagrams show the relationship between variant-dependent tasks.

.XCTest Plugin variant-dependent task graph
image::xctest-variant-task-graph.png[]

project :A FAILED
   Failures:
      - Could not resolve project :A.
        Creating consumable variants is explained in more detail at https://docs.gradle.org/${GradleVersion.current().version}/userguide/declaring_dependencies.html#sec:resolvable-consumable-configs.
          - Unable to find a matching variant of project :A:
              - No variants exist.

project :A FAILED
\\--- conf
"""

        when:

            def platform = mavenRepo.module("com.acme.foo", "platform", v)
            platform.assertPublished()
            platform.hasGradleMetadataRedirectionMarker()
            platform.parsedModuleMetadata.variant("apiElements") {
                constraint("com.acme.foo:core:$v") {
                    exists()
                }
                constraint("com.acme.foo:lib:$v") {
                    exists()
                }