elt -- the current DOMWrapper element 
           sw -- soapWriter object
           pyobj -- python object to serialize

def serialize(self, elt, sw, pyobj, name=None, orig=None, **kw):
        '''elt -- the current DOMWrapper element 
           sw -- soapWriter object
           pyobj -- python object to serialize
        '''
        if pyobj is not None and type(pyobj) not in _seqtypes:
            raise EvaluateException, 'expecting a list or None'

        objid = _get_idstr(pyobj)
        ns,n = self.get_name(name, objid)
        el = elt.createAppendElement(ns, n)
        if self.nillable is True and pyobj is None:
            self.serialize_as_nil(el)
            return None
        
        tc = self.itemTypeCode
        s = StringIO(); sep = ' '
        for item in pyobj:
            s.write(tc.get_formatted_content(item))
            s.write(sep)

        el.createAppendTextNode(s.getvalue())