private final NotationParser<Object, DependencyConstraintMetadata> dependencyConstraintNotationParser;
    private final List<VariantMetadataRules.VariantAction<? super DirectDependenciesMetadata>> dependencyActions = new ArrayList<>();
    private final List<VariantMetadataRules.VariantAction<? super DependencyConstraintsMetadata>> dependencyConstraintActions = new ArrayList<>();

    }

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

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

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

import org.gradle.internal.component.external.model.VariantMetadataRules;

import java.util.LinkedList;
import java.util.List;

public class VariantFilesRules {
    private final List<VariantMetadataRules.VariantAction<? super MutableVariantFilesMetadata>> actions = new LinkedList<>();

    public void addFilesAction(VariantMetadataRules.VariantAction<? super MutableVariantFilesMetadata> action) {

        when:
        mavenMetadata.variantMetadataRules.addDependencyAction(instantiator, notationParser, constraintNotationParser, variantAction("default", {
            assert it.size() == 1
            assert it[0].name == "notOptional"
        }))

    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;

    }

    @Override
    void doAddDependencyMetadataRule(MutableModuleComponentResolveMetadata metadataImplementation, String variantName, Action<? super DependenciesMetadata> action) {
        metadataImplementation.variantMetadataRules.addDependencyAction(instantiator, notationParser, constraintNotationParser, variantAction(variantName, action))
    }

 * Used to represent Ivy and Maven modules in the dependency graph.
 */
public class DefaultConfigurationMetadata extends AbstractConfigurationMetadata {

    private final VariantMetadataRules componentMetadataRules;

    private List<? extends ModuleDependencyMetadata> calculatedDependencies;
    private ImmutableList<? extends ModuleComponentArtifactMetadata> calculatedArtifacts;

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;