then:
        result == null

        and:
        1 * dependencyConstraintFactory.createDependencyConstraint("someNotation") >> constraint1
        1 * dependencyConstraintFactory.createDependencyConstraint("someOther") >> constraint2
        1 * dependencyConstraintSet.add(constraint1)
        1 * dependencyConstraintSet.add(constraint2)
    }

/**
 * Internal API for dependency constraint creation.
 */
public interface DependencyConstraintFactoryInternal extends DependencyConstraintFactory {
    DependencyConstraint createDependencyConstraint(Object dependencyNotation);

        this.dependencyConstraintNotationParser = dependencyConstraintNotationParser;
        this.attributesFactory = attributesFactory;
    }

    @Override
    public DependencyConstraint createDependencyConstraint(Object dependencyNotation) {
        DependencyConstraint dependencyConstraint = dependencyConstraintNotationParser.getNotationParser().parseNotation(dependencyNotation);
        injectServices(dependencyConstraint);

    }

    private DependencyConstraint doCreate(Object dependencyNotation, @Nullable Action<? super DependencyConstraint> configureAction) {
        DependencyConstraint dependencyConstraint = dependencyConstraintFactory.createDependencyConstraint(dependencyNotation);
        if (configureAction != null) {
            configureAction.execute(dependencyConstraint);
        }
        return dependencyConstraint;
    }