/**
     * Defines external profiles that may be activated for the given model.
     * Those are external profiles usually defined in {@link org.apache.maven.api.settings.Settings#getProfiles()}.
     */
    @Nonnull
    Collection<Profile> getProfiles();

    /**
     * List of profile ids that have been explicitly activated by the user.
     */
    @Nonnull
    List<String> getActiveProfileIds();

    /**

    /**
     * Gets the external profiles that were active during model building. External profiles are those that were
     * contributed by {@link ModelBuilderRequest#getProfiles()}.
     *
     * @return The active external profiles or an empty list if none, never {@code null}.
     */
    @Nonnull
    List<Profile> getActiveExternalProfiles();

    /**

                .flatMap(p -> p.getModel().getDelegate().getProfiles().stream())
                .map(Profile::getId);
        final Stream<String> settingsProfiles =
                session.getSettings().getProfiles().stream().map(org.apache.maven.settings.Profile::getId);
        final Stream<String> superPomProfiles = superPomModels.values().stream()
                .flatMap(p -> p.getProfiles().stream())
                .map(Profile::getId);

    public java.util.Map<String, Profile> getProfilesAsMap() {
        if (profileMap == null) {
            profileMap = new java.util.LinkedHashMap<String, Profile>();
            if (getProfiles() != null) {
                for (Profile profile : getProfiles()) {
                    profileMap.put(profile.getId(), profile);
                }
            }
        }
        return profileMap;
    }

            Model.Builder builder, Model target, Model source, boolean sourceDominant, Map<Object, Object> context) {
        Iterator<Profile> sourceIterator = source.getProfiles().iterator();
        builder.profiles(target.getProfiles().stream()
                .map(d -> mergeProfile(d, sourceIterator.next(), sourceDominant, context))
                .collect(Collectors.toList()));
    }

    @Override

                                        .childScmDeveloperConnectionInheritAppendPath(null)
                                        .build()
                                : null);
        builder.profiles(prune(model.getProfiles()));

        model = builder.build();
        String modelVersion = new MavenModelVersion().getModelVersion(model);
        if (!ModelBuilder.MODEL_VERSION_4_0_0.equals(modelVersion) && !preserveModelVersion) {

                // do nothing for now
            }
        }

        request.setActiveProfiles(settings.getActiveProfiles());

        for (Profile rawProfile : settings.getProfiles()) {
            request.addProfile(SettingsUtils.convertFromSettingsProfile(rawProfile));

            if (settings.getActiveProfiles().contains(rawProfile.getId())) {

                validateStringNotEmpty(problems, "mirrors.mirror.mirrorOf", mirror.getMirrorOf(), mirror.getId());
            }
        }

        List<Profile> profiles = settings.getProfiles();

        if (profiles != null) {
            Set<String> profileIds = new HashSet<>();

            for (Profile profile : profiles) {
                if (!profileIds.add(profile.getId())) {

                new HashSet<>(request.getProfileActivation().getRequiredActiveProfileIds());
        activeProfileId.addAll(request.getProfileActivation().getOptionalActiveProfileIds());

        return request.getProfiles().stream()
                .filter(profile -> activeProfileId.contains(profile.getId()))
                .map(ModelBase::getProperties)
                .flatMap(properties -> properties.entrySet().stream())

            // profiles: they are essential for proper model building (may contribute profiles, dependencies...)
            HashSet<String> minProfileIds = new HashSet<>();
            for (Profile profile : m.getProfiles()) {
                if (!minProfileIds.add(profile.getId())) {
                    addViolation(
                            problems,
                            Severity.WARNING,