protected void mergeBuildBase_Filters(
            BuildBase target, BuildBase source, boolean sourceDominant, Map<Object, Object> context) {
        List<String> src = source.getFilters();
        if (!src.isEmpty()) {
            List<String> tgt = target.getFilters();
            Set<String> excludes = new LinkedHashSet<>(tgt);
            List<String> merged = new ArrayList<>(tgt.size() + src.size());
            merged.addAll(tgt);

	o.parseMarker()
	if o.BaseDir == "" {
		o.BaseDir = baseDirFromPrefix(o.Prefix)
	}
	o.Transient = o.Transient || isReservedOrInvalidBucket(o.Bucket, false)
	o.SetFilter()
	if o.Transient {
		o.Create = false
	}

	// We have 2 cases:
	// 1) Cold listing, just list.
	// 2) Returning, but with no id. Start async listing.
	// 3) Returning, with ID, stream from list.
	//

                val = interpolate(org);
                if (org != val) {
                    build.setFinalName(val);
                }
                // Filters
                visit(build.getFilters());
            }
        }

        private void visit(PluginManagement pluginManagement) {
            if (pluginManagement != null) {
                for (Plugin plugin : pluginManagement.getPlugins()) {

func (o *listPathOptions) objectPath(block int) string {
	return pathJoin(metacachePrefixForID(o.Bucket, o.ID), "block-"+strconv.Itoa(block)+".s2")
}

func (o *listPathOptions) SetFilter() {
	switch {
	case metacacheSharePrefix:
		return
	case o.Prefix == o.BaseDir:
		// No additional prefix
		return
	}
	// Remove basedir.
	o.FilterPrefix = strings.TrimPrefix(o.Prefix, o.BaseDir)