type</code></td><td><code style="white-space: normal">nothing</code></td>   
<tr><td><code style="white-space: normal">class_id_reference_type</code></td><td><code style="white-space: normal">int</code></td>   
<tr><td><code style="white-space: normal">tracking_type</code></td><td><code style="white-space: normal">bool</code></td>   
<tr><td><code style="white-space: normal">classname_type</code></td><td><code style="white-space: normal">string</code></td>   
</table>
<p>
All of these are associated with a 