private ApplicationMap buildForNoRequest(Application source, ApplicationMapBuilder builder) {
        // If no nodes are found, we still need to build the map with the source application.
        builder.includeServerInfo(newServerGroupListFactory(false));
        return builder.build(source, buildTimeoutMillis);
    }
Used in the main UI - draws the server map by querying the timeslot by time.
web/src/main/java/com/navercorp/pinpoint/web/applicationmap/service/MapServiceImpl.java