@Override
    public String toString() {
        return "Metric{" +
                "time=" + time +
                ", name=" + name.id +
                ", value='" + value + '\'' +
                ", dimensions=" + dimensions +
                '}';
    }
@return The UTC timestamp for when this metric was collected
metrics-proxy/src/main/java/ai/vespa/metricsproxy/metric/Metric.java