How do I display the content of a subtiddler (shadow tiddler) as code/unrendered

The info needed is described at:

eg:

\define subtiddler() $:/plugins/tiddlywiki/internals/readme
\define plugin-tiddler() $:/plugins/tiddlywiki/internals

<$set name=shadowContent tiddler=<<plugin-tiddler>> subtiddler=<<subtiddler>> field=text >

<pre><code>
<$text text=<<shadowContent>>/>
</code></pre>