revents the CLOS decoder from processing an incoming datum like</p>

<pre class="example">{"prototype": {"lispPackage": "worldDestruction",
               "lispClass": "tickingBomb"},
 "timeout": 10,
 "setOffImmediatelyOnInstantiation": true}</pre>

<p>If a careless and/or malevolent remote party manages to sneak in such a request the calamitous results will not be late in coming.  However, as the decoding of every input <code class="json">Object</code> eventually involves a call to <code class="api-name">m