Enables the 
<a href="https://www.flexdoc.xyz/flexdoc-xml/DiagramKit/">FlexDoc/XML DiagramKit</a>.
When this parameter is unselected (<b><code>false</code></b>), no diagrams will be generated.
<p>
<b>Note:</b> This parameter group is enabled only when the <b>&ldquo;DiagramKit&rdquo;</b>
<a href="#diagramming_plugin">plugin</a> is active!
For more details, please see the plugin README found in your FlexDoc/XML installation:
<dl style="margin-bottom:0"><dd>
<code>{flexdoc-xml}/DiagramKit/README.html</code>
</dd></dl>

${include ../refs/diagramming_plugin.htm}