collect.setTrace(RequestTrace.newChild(trace, depRequest));
            node = repoSystem.collectDependencies(session, collect).getRoot();
            result.setDependencyGraph(node);
        } catch (DependencyCollectionException e) {
            result.setDependencyGraph(e.getResult().getRoot());
            result.setCollectionErrors(e.getResult().getExceptions());

            throw new DependencyResolutionException(

    private Map<Dependency, List<Exception>> resolutionErrors = new IdentityHashMap<>();

    @Override
    public DependencyNode getDependencyGraph() {
        return root;
    }

    public void setDependencyGraph(DependencyNode root) {
        this.root = root;
    }

    @Override
    public List<Dependency> getDependencies() {
        return dependencies;
    }

    @Override