<td><pre>
descriptorName: request_count
value: "1"
labels:
  source: origin.ip
  destination: destination.service
</pre></td></tr></tbody></table><p><em>Note that when numeric literals are used as strings (like <code>value</code> above) they must be enclosed in quotes. Quotation marks (<code>"</code>) are optional for normal strings.</em></p><h3 id="repeated-fields"><code>repeated</code> fields</h3><table><tbody><tr><th>Proto</th><th>YAML</th></tr><tr><td><pre>
message Metric {
        string descriptor_nam