e labels (matching the dimensions configured for <code>doublerequestcount.metric</code> instances).</p><p>For <code>kind: prometheus</code> handlers, Mixer instances are matched to Prometheus metrics via the <code>instance_name</code> parameter. The <code>instance_name</code> values must be the fully-qualified name for Mixer instances (example: <code>doublerequestcount.metric.istio-system</code>).</p><p>The <code>kind: rule</code> stanza of config defines a new <em>rule</em> named <code>doubleprom</code>. T