private static void addHostnamePattern(Builder<Tag> tagListBuilder, RequestOnlyLog log) {
        final RequestContext ctx = log.context();
        if (ctx instanceof ServiceRequestContext) {
            final ServiceRequestContext sCtx = (ServiceRequestContext) ctx;
            tagListBuilder.add(Tag.of("hostname.pattern", sCtx.config().virtualHost().hostnamePattern()));
        }
    }
Adds {@code http.status} tag to the {@code tagListBuilder}.
core/src/main/java/com/linecorp/armeria/internal/common/metric/DefaultMeterIdPrefixFunction.java