/**
     * Should the build continue if the target is not present?
     */
    final boolean optional;

    ActivationSettings(final boolean active, final boolean optional) {
        this.active = active;
        this.optional = optional;
    }

    static ActivationSettings of(final boolean active, final boolean optional) {
        if (optional) {
            return active ? ACTIVATION_OPTIONAL : DEACTIVATION_OPTIONAL;

        /**
         * This describes how/when to active or deactivate the project.
         */
        final ActivationSettings activationSettings;

        ProjectActivationSettings(String selector, ActivationSettings activationSettings) {
            this.selector = selector;
            this.activationSettings = activationSettings;
        }
    }

    /**
     * List of activated and deactivated projects.
     */

     */
    public void addProfileActivation(String id, boolean active, boolean optional) {
        final ActivationSettings settings = ActivationSettings.of(active, optional);
        this.activations.put(id, settings);
    }

    private Set<String> getProfileIds(final Predicate<ActivationSettings> predicate) {
        return this.activations.entrySet().stream()
                .filter(e -> predicate.test(e.getValue()))