def _route(self, mapper):
<EOL>kwargs = dict(conditions=dict(function=self._filter))<EOL>if self.verbs:<EOL><INDENT>kwargs['<STR_LIT>']['<STR_LIT>'] = self.verbs<EOL><DEDENT>if self.requirements:<EOL><INDENT>kwargs['<STR_LIT>'] = self.requirements<EOL><DEDENT>uri = self.route(self.uri, kwargs)<EOL>mapper.connect(None, uri, **kwargs)<EOL>
Set up the route(s) corresponding to the limit.  This controls
which limits are checked against the request.

:param mapper: The routes.Mapper object to add the route to.