 parameter instance. E.g. if a string
 value is to be converted into a method parameter, this would be the annotations on that parameter as returned by
 <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/reflect/Method.html#getParameterAnnotations()" title="class or interface in java.lang.reflect" class="external-link"><code>Method.getParameterAnnotations()</code></a>.</dd>
<dt>Returns:</dt>
<dd>the string converter, otherwise <code>null</code>.</dd>
</dl>
</section>
</li>
</ul>