Initiate the resource retrieving all the asynchronous
        information needed to support the IWebResource interface.

def initiate(self):
        """
        Initiate the resource retrieving all the asynchronous
        information needed to support the IWebResource interface.
        """

        def deduce_methods(actions):
            self._methods.add(http.Methods.GET)
            for action in actions:
                method = self.action_methods.get(action.name)
                if method is not None:
                    self._methods.add(method)

        d = self.model.fetch_actions()
        d.addCallback(deduce_methods)
        d.addCallback(defer.override_result, self)
        d.addErrback(self.filter_errors)
        return d