* in the {@link #execute(VariantResolveMetadata, List)} method when the dependencies of a variant are needed during dependency resolution.
 */
public class DependencyMetadataRules {
    private static final Spec<ModuleDependencyMetadata> DEPENDENCY_FILTER = dep -> !dep.isConstraint();
    private static final Spec<ModuleDependencyMetadata> DEPENDENCY_CONSTRAINT_FILTER = DependencyMetadata::isConstraint;

        if (dependencyMetadataRules == null) {
            dependencyMetadataRules = new DependencyMetadataRules(instantiator, dependencyNotationParser, dependencyConstraintNotationParser, attributesFactory);
        }
        dependencyMetadataRules.addDependencyAction(action);
    }

     */
    @Override
    ImmutableAttributes getAttributes();

    /**
     * Returns the dependencies that apply to this configuration.
     *
     * If the implementation supports {@link DependencyMetadataRules}, this method
     * is responsible for lazily applying the rules the first time it is called.
     */
    List<? extends DependencyMetadata> getDependencies();

    /**