@Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        ServiceStatusInfo that = (ServiceStatusInfo) o;
        return status == that.status &&
                Objects.equals(since, that.since) &&
                Objects.equals(lastChecked, that.lastChecked);
    }
The last time the status was checked.
application-model/src/main/java/com/yahoo/vespa/applicationmodel/ServiceStatusInfo.java