OptionalDependencySelector.fromDirect(),
                new ExclusionDependencySelector());
    }

    protected DependencyGraphTransformer getDependencyGraphTransformer() {
        return new ChainedDependencyGraphTransformer(
                new ConflictResolver(
                        new ConfigurableVersionSelector(), new ManagedScopeSelector(getScopeManager()),

        session.setDependencyManager(new ClassicDependencyManager()); // Maven 3 behavior
        session.setDependencySelector(builder.getDependencySelector());
        session.setDependencyGraphTransformer(builder.getDependencyGraphTransformer());
        session.setArtifactTypeRegistry(builder.getArtifactTypeRegistry());
        session.setArtifactDescriptorPolicy(builder.getArtifactDescriptorPolicy());
        return session;
    }

            pluginSession.setDependencySelector(session.getDependencySelector());
            pluginSession.setDependencyGraphTransformer(session.getDependencyGraphTransformer());

            CollectRequest request = new CollectRequest();
            request.setRequestContext(REPOSITORY_CONTEXT);
            request.setRepositories(repositories);