if (variants.isEmpty()) {
            addVariantsFromRules(metadata, configurations, variantMetadataRules);
        }

        return new RealisedIvyModuleResolveMetadata(metadata, variants, configurations);
    }

    private static Map<String, ModuleConfigurationMetadata> realiseConfigurations(DefaultIvyModuleResolveMetadata metadata, VariantMetadataRules variantMetadataRules) {

    public static RealisedMavenModuleResolveMetadata transform(DefaultMavenModuleResolveMetadata metadata) {
        VariantMetadataRules variantMetadataRules = metadata.getVariantMetadataRules();
        ImmutableList<? extends ComponentVariant> variants = LazyToRealisedModuleComponentResolveMetadataHelper.realiseVariants(metadata, variantMetadataRules, metadata.getVariants());

 */
public abstract class AbstractLazyModuleComponentResolveMetadata extends AbstractModuleComponentResolveMetadata {
    private final VariantMetadataRules variantMetadataRules;
    private final ImmutableMap<String, Configuration> configurationDefinitions;

    // Configurations are built on-demand, but only once.
    private final Map<String, ModuleConfigurationMetadata> configurations = new HashMap<>();

        given:
        def rule = Mock(Action)

        when:
        metadata.variantMetadataRules.addVariant('new-variant', 'runtime', false)
        metadata.variantMetadataRules.addVariantFilesAction(new VariantMetadataRules.VariantAction<MutableVariantFilesMetadata>(null, rule))
        def newVariant =  metadata.asImmutable().variantsForGraphTraversal.find { it.name == 'new-variant' }

    }

    @Override
    public ImmutableAttributesFactory getAttributesFactory() {
        return null;
    }

    @Override
    public VariantMetadataRules getVariantMetadataRules() {
        return VariantMetadataRules.noOp();
    }

    @Override
    public ImmutableAttributes getAttributes() {
        return ImmutableAttributes.EMPTY;
    }

    private MutableModuleSources moduleSources;
    private /*Mutable*/AttributeContainerInternal componentLevelAttributes;
    private final AttributesSchemaInternal schema;

    private final VariantMetadataRules variantMetadataRules;
    private final VariantDerivationStrategy variantDerivationStrategy;

    private List<MutableComponentVariant> newVariants;
    private ImmutableList<? extends ComponentVariant> variants;

        this.configurations = ImmutableMap.<String, ModuleConfigurationMetadata>builder().putAll(configurations).build();
    }

    @Override
    public VariantMetadataRules getVariantMetadataRules() {
        return VariantMetadataRules.noOp();
    }

    @Override
    public Set<String> getConfigurationNames() {
        return configurations.keySet();
    }

    @Nullable
    @Override

import org.gradle.internal.component.external.model.DefaultModuleComponentSelector;
import org.gradle.internal.component.external.model.ModuleDependencyMetadata;
import org.gradle.internal.component.external.model.VariantMetadataRules;
import org.gradle.internal.component.model.ComponentGraphResolveState;
import org.gradle.internal.component.model.ComponentIdGenerator;
import org.gradle.internal.component.model.ConfigurationMetadata;

import org.gradle.internal.component.external.model.ModuleDependencyMetadata;
import org.gradle.internal.component.external.model.ModuleDependencyMetadataWrapper;
import org.gradle.internal.component.external.model.VariantMetadataRules;
import org.gradle.internal.component.external.model.VirtualComponentIdentifier;
import org.gradle.internal.component.local.model.DslOriginDependencyMetadata;

import org.gradle.internal.component.external.model.ModuleDependencyMetadata;
import org.gradle.internal.component.external.model.VariantDerivationStrategy;
import org.gradle.internal.component.external.model.VariantMetadataRules;
import org.gradle.internal.component.model.IvyArtifactName;
import org.gradle.internal.component.model.ModuleConfigurationMetadata;
import org.gradle.internal.component.model.ModuleSources;