em>instance</em> configuration, <em>handler</em> configuration, and <em>rule</em> configuration.</p><p>The <code>kind: metric</code> stanza of config defines a schema for generated metric values (or <em>instances</em>) for a new metric named <code>doublerequestcount</code>. This instance configuration tells Mixer <em>how</em> to generate metric values for any given request, based on the attributes reported by Envoy (and generated by Mixer itself).</p><p>For each instance of <code>doublerequestcount.metric</