if (proxy != null) {
                org.apache.maven.repository.Proxy p = new org.apache.maven.repository.Proxy();
                p.setHost(proxy.getHost());
                p.setProtocol(proxy.getType());
                p.setPort(proxy.getPort());
                if (proxy.getAuthentication() != null) {

                                    return r.getCollectionErrors();
                                }

                                @Override
                                public Node getRoot() {
                                    return session.getNode(r.getDependencyGraph());
                                }
                            });
                }
            };

     */
    @Nonnull
    @Override
    public Node collectDependencies(@Nonnull Artifact artifact) {
        return getService(DependencyCollector.class).collect(this, artifact).getRoot();
    }

    /**
     * Shortcut for <code>getService(DependencyCollector.class).collect(...)</code>
     *
     * @throws DependencyCollectorException if the dependency collection failed

                            null,
                            "must be unique but found duplicate proxy with id " + proxy.getId());
                }
                validateStringNotEmpty(problems, "proxies.proxy.host", proxy.getHost(), proxy.getId());

                try {
                    Integer.parseInt(proxy.getPortString());
                } catch (NumberFormatException e) {
                    addViolation(

            AuthenticationBuilder authBuilder = new AuthenticationBuilder();
            authBuilder.addUsername(proxy.getUserName()).addPassword(proxy.getPassword());
            result = new Proxy(proxy.getProtocol(), proxy.getHost(), proxy.getPort(), authBuilder.build());
        }
        return result;
    }

    public static ArtifactHandler newHandler(Artifact artifact) {

            }
        }
        return null;
    }

    @Override
    public List<Exception> getExceptions() {
        return exceptions;
    }

    @Override
    public Node getRoot() {
        return root;
    }

    @Override
    public List<Node> getNodes() {
        return nodes;
    }

    @Override
    public List<Path> getPaths() {
        return paths;

            }
        }
        return null;
    }

    @Override
    public List<Exception> getExceptions() {
        return exceptions;
    }

    @Override
    public Node getRoot() {
        return root;
    }

    @Override
    public List<Node> getNodes() {
        return nodes;
    }

    @Override
    public List<Path> getPaths() {
        return paths;

            proxySelector.add(
                    new org.eclipse.aether.repository.Proxy(
                            proxy.getProtocol(), proxy.getHost(), proxy.getPort(), authBuilder.build()),
                    proxy.getNonProxyHosts());
        }
        sessionBuilder.setProxySelector(proxySelector);

                plugin, parent, null, foreignImports, toAetherArtifacts(pluginArtifacts));

        discoverPluginComponents(pluginRealm, plugin, pluginDescriptor);

        pluginDescriptor.setDependencyNode(result.getRoot());
        pluginDescriptor.setClassRealm(pluginRealm);
        pluginDescriptor.setArtifacts(pluginArtifacts);
    }

    private void discoverPluginComponents(