*/
    public Set<String> getRequiredActiveProfileIds() {
        return getProfileIds(pa -> !pa.optional() && pa.active());
    }

    /**
     * @return Optional active profile identifiers, never {@code null}.
     */
    public Set<String> getOptionalActiveProfileIds() {
        return getProfileIds(pa -> pa.optional() && pa.active());
    }

    /**