rough the object's command) by the object
being defined. Note that the methods themselves may be actually defined by a
class or superclass; object exports override class visibility.
<P><DT><A NAME="M24"><B>filter</B> ?<I>-slotOperation</I>? ?<I>methodName ...</I>?</A><DD>
This slot (see <B><A HREF="define.html#M31">SLOTTED DEFINITIONS</A></B> below)
sets or updates the list of method names that are used to guard whether a
method call to the object may be called and what the method's results are.
Each <I>met