* Add a dependency constraint.
     *
     * @param dependencyConstraint dependency constraint to add
     */
    public static void call(DependencyCollector self, DependencyConstraint dependencyConstraint) {
        self.addConstraint(dependencyConstraint);
    }

    /**
     * Add a dependency constraint.
     *
     * @param dependencyConstraint dependency constraint to add

        private final String name;
        private final List<ComponentVariant.Dependency> dependencies = new ArrayList<>();
        private final List<ComponentVariant.DependencyConstraint> dependencyConstraints = new ArrayList<>();
        private final List<FileImpl> files = new ArrayList<>();
        private final Set<Capability> capabilities = new LinkedHashSet<>();

        // remain consistent with the behavior for dependencies.
        for (DependencyConstraint dependencyConstraint : configuration.getDependencyConstraints()) {
            dependencyBuilder.add(dependencyMetadataFactory.createDependencyConstraintMetadata(dependencyConstraint));
        }

        for (ExcludeRule excludeRule : configuration.getExcludeRules()) {

            return dependencyMetadata(dependency)
        }

        @Override
        LocalOriginDependencyMetadata createDependencyConstraintMetadata(DependencyConstraint dependencyConstraint) {
            throw new UnsupportedOperationException()
        }
    }