   Instance method:
     classns:method(obj, arg1, arg2, ...)
 </pre>
 We use the following rules to determine the type of call made:
 <ol type="1">
 <li>If the function name is "new", call the best constructor for
     class represented by the namespace URI</li>
 <li>If the first argument to the function is of the class specified
     in the namespace or is a subclass of that class, look for the best
     method of the class specified in the namespace with the specified
     arguments.  Compare all static 