the buckets that will be used to store the aggregated values.
This field must be provided for metrics declared to be of type DISTRIBUTION.
This field will be ignored for non-distribution metric kinds.</p></td><td>No</td></tr><tr id=Params-MetricInfo-metric_type><td><code>metricType</code></td><td><code>string</code></td><td><p>Stackdriver metric type name, e.g.
istio.io/service/server/request_count. If this is not provided, a
concantenation of custom metric prefix (custom.googleapis.com/) and
Istio metric n