use soapAction dict for WS-Action input, setup wsAction
        dict for grabbing WS-Action output values.

def setUpClassDef(self, service):
        '''use soapAction dict for WS-Action input, setup wsAction
        dict for grabbing WS-Action output values.
        '''
        assert isinstance(service, WSDLTools.Service), \
            'expecting WSDLTools.Service instance'

        s = self._services[service.name].classdef
        print >>s, 'class %s(%s):' %(self.getClassName(service.name), self.base_class_name)
        print >>s, '%ssoapAction = {}' % self.getIndent(level=1)
        print >>s, '%swsAction = {}' % self.getIndent(level=1)
        print >>s, '%sroot = {}' % self.getIndent(level=1)