tance</h2><section><p>An Instance tells Mixer how to create instances for particular template.</p><p>Instance is defined by the operator. Instance is defined relative to a known
template. Their purpose is to tell Mixer how to use attributes or literals to produce
instances of the specified template at runtime.</p><p>The following example instructs Mixer to construct an instance associated with template
&lsquo;istio.mixer.adapter.metric.Metric&rsquo;. It provides a mapping from the template&rsquo;s fields to