void maybeAddTagsToSpan(ServiceRequestContext ctx, BI braveReq, Span span) {
        if (span.isNoop()) {
            // For no-op spans, nothing special to do.
            return;
        }

        ctx.log().whenComplete().thenAccept(log -> {
            annotateWireSpan(log, span);
            final BO braveRes = braveResponse(ctx, log, braveReq);
            handleSend(braveRes, span);
        });
    }
Creates a new instance that decorates the specified {@link Service}.
brave/brave6/src/main/java/com/linecorp/armeria/server/brave/AbstractBraveService.java