@Test
    void testValidateUniqueProxyId() throws Exception {
        Settings settings = new Settings();
        Proxy proxy = new Proxy();
        String id = "foo";
        proxy.setId(id);
        proxy.setHost("www.example.com");
        settings.addProxy(proxy);
        settings.addProxy(proxy);

        SimpleProblemCollector problems = new SimpleProblemCollector();
        validator.validate(settings, problems);

                        .value(modelProp.getValue())
                        .build();
                activation.property(prop);
            }

            org.apache.maven.api.model.ActivationOS modelOs = modelActivation.getOs();

            if (modelOs != null) {
                ActivationOS os = ActivationOS.newBuilder()
                        .arch(modelOs.getArch())
                        .family(modelOs.getFamily())

                prop.setValue(profileProp.getValue());

                activation.setProperty(prop);
            }

            ActivationOS profileOs = profileActivation.getOs();

            if (profileOs != null) {
                org.apache.maven.model.ActivationOS os = new org.apache.maven.model.ActivationOS();

                os.setArch(profileOs.getArch());

                                    return r.getCollectionErrors();
                                }

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

                        .value(modelProp.getValue())
                        .build();
                activation.property(prop);
            }

            org.apache.maven.api.model.ActivationOS modelOs = modelActivation.getOs();

            if (modelOs != null) {
                ActivationOS os = ActivationOS.newBuilder()
                        .arch(modelOs.getArch())
                        .family(modelOs.getFamily())

tion); public boolean retainAll(java.util.Collection); public Object set(int, Object); protected final java.util.List checkedGetList() throws org.codehaus.plexus.component.repository.exception.ComponentLookupExcep; protected final java.util.List getList(); public final String getRole(); protected final void setRole(String); public final void contextualize(org.codehaus.plexus.context.Context) throws org.codehaus.plexus.context.ContextException; protected final org.codehaus.plexus.logging.Logger getLogger();...

tion); public boolean retainAll(java.util.Collection); public Object set(int, Object); protected final java.util.List checkedGetList() throws org.codehaus.plexus.component.repository.exception.ComponentLookupExcep; protected final java.util.List getList(); public final String getRole(); protected final void setRole(String); public final void contextualize(org.codehaus.plexus.context.Context) throws org.codehaus.plexus.context.ContextException; protected final org.codehaus.plexus.logging.Logger getLogger();...

    @Nonnull
    Session getSession();

    Optional<Project> getProject();

    @Nonnull
    Optional<Artifact> getRootArtifact();

    @Nonnull
    Optional<DependencyCoordinate> getRoot();

    @Nonnull
    Collection<DependencyCoordinate> getDependencies();

    @Nonnull
    Collection<DependencyCoordinate> getManagedDependencies();

    boolean getVerbose();

    @Nonnull

            RepositorySystemSession session)
            throws PluginResolutionException {
        return resolveInternal(plugin, pluginArtifact, dependencyFilter, repositories, session)
                .getRoot();
    }

    private DependencyResult resolveInternal(
            Plugin plugin,
            Artifact pluginArtifact,
            DependencyFilter dependencyFilter,

        Activation activation = profile.getActivation();
        return activation != null && activation.getOs() != null;
    }

    public boolean isActive(Profile profile) {
        Activation activation = profile.getActivation();
        ActivationOS os = activation.getOs();

        boolean result = ensureAtLeastOneNonNull(os);

        if (result && os.getFamily() != null) {