a><a href="#C5_L11" id=C5_L11></a></span></code></pre>
<p>For performance reasons, note that you cannot redefine an instance's
computed properties or methods when calling <code>create()</code>, nor can you
define new ones. You should only set simple properties when calling
<code>create()</code>. If you need to define or redefine methods or computed
properties, create a new subclass and instantiate that.</p>
<p>By convention, properties or variables that hold classes are
PascalCased, while instances are not.