*/
    public void merge(Settings dominant, Settings recessive, String recessiveSourceLevel) {
        if (dominant == null || recessive == null) {
            return;
        }

        recessive.setSourceLevel(recessiveSourceLevel);

        List<String> dominantActiveProfiles = dominant.getActiveProfiles();
        List<String> recessiveActiveProfiles = recessive.getActiveProfiles();

    public void merge(PersistedToolchains dominant, PersistedToolchains recessive, String recessiveSourceLevel) {
        if (dominant == null || recessive == null) {
            return;
        }

        recessive.setSourceLevel(recessiveSourceLevel);

        dominant.update(new org.apache.maven.toolchain.v4.MavenToolchainsMerger()
                .merge(dominant.getDelegate(), recessive.getDelegate(), true, null));
    }

        public static final String GLOBAL_LEVEL = "global-level";

        private String sourceLevel = USER_LEVEL;
        private boolean sourceLevelSet = false;

        public void setSourceLevel(String sourceLevel) {
            if (sourceLevelSet) {
                throw new IllegalStateException("Cannot reset sourceLevel attribute; it is already set to: " + sourceLevel);

    public static final String GLOBAL_LEVEL = "global-level";

    private String sourceLevel = USER_LEVEL;
    private boolean sourceLevelSet = false;

    public void setSourceLevel(String sourceLevel) {
        if (sourceLevelSet) {
            throw new IllegalStateException("Cannot reset sourceLevel attribute; it is already set to: " + sourceLevel);