Dependency target, Dependency source, boolean sourceDominant, Map<Object, Object> context) {
            // optional flag is not managed
        }

        @Override
        protected void mergeDependency_Exclusions(
                Dependency target, Dependency source, boolean sourceDominant, Map<Object, Object> context) {
            List<Exclusion> tgt = target.getExclusions();
            if (tgt.isEmpty()) {

                .map(d -> mergeDependency(d, sourceIterator.next(), sourceDominant, context))
                .collect(Collectors.toList()));
    }

    @Override
    protected void mergeDependency_Exclusions(
            Dependency.Builder builder,
            Dependency target,
            Dependency source,
            boolean sourceDominant,
            Map<Object, Object> context) {
        // don't merge

        mergeDependency_SystemPath(target, source, sourceDominant, context);
        mergeDependency_Optional(target, source, sourceDominant, context);
        mergeDependency_Exclusions(target, source, sourceDominant, context);
    }

    protected void mergeDependency_GroupId(
            Dependency target, Dependency source, boolean sourceDominant, Map<Object, Object> context) {