PluginConfiguration source,
            boolean sourceDominant,
            Map<Object, Object> context) {
        PluginManagement src = source.getPluginManagement();
        if (src != null) {
            PluginManagement tgt = target.getPluginManagement();
            if (tgt == null) {
                tgt = new PluginManagement();
                target.setPluginManagement(tgt);
            }