private ImmutableList<Tag> sortedImmutableTags(String[] tags) {
        requireNonNull(tags, "tags");
        if (tags.length == 0) {
            return this.tags;
        }

        final List<Tag> list = new ArrayList<>(this.tags);
        zip(list, tags);
        return sort(list);
    }
Returns the {@link Tag}s concatenated by the specified {@code tags}.
core/src/main/java/com/linecorp/armeria/common/metric/MeterIdPrefix.java