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<nobr><b><font color="#000000">change-class</font></b></nobr></td><td valign="baseline"> &nbsp; </td><td valign="baseline" align="left" width="99%"><var>instance <nobr>new-class</nobr></var>
<code>&#38;key</code> <nobr><code>&#38;allow-other-keys</code></nobr>
<nobr><span 
    style="font-family: serif; font-style: normal">=&gt;</span> <nobr><var>change