public IvyNode(ResolveData data, ModuleDescriptor md, String conf) { this(data, md, conf, false);
public IvyNode(ResolveData data, DependencyDescriptor dd) { _id = dd.getDependencyRevisionId(); _dd = dd;  init(data, true);
    public IvyNode(ResolveData data, ModuleDescriptor md, String conf) {        this(data, md, conf, false);    }