line">&nbsp; </td><td valign="baseline" align="left" width="99%">
<code>:around</code>
<code>(</code><var>instance</var> <code>standard-object)</code>
<code>(</code><var>new-class</var> <code>standard-unit-class)</code>
<code>&#38;key</code> <nobr><code>&#38;allow-other-keys</code></nobr>
<span 
    style="font-family: serif; font-style: normal">=&gt;</span> <var>instance</var>
</td></tr></table>
<table class="tight" width="100%">
<tr valign="top"><td valign="baseline" align="left"><nobr>change-class</nobr>