Makes request to :func:`Interface.request` and caches it.

        :param url: endpoint url
        :params \*\*kwargs: kwargs to pass to :func:`requests.request`

def _request(self, url, **kwargs):
        '''Makes request to :func:`Interface.request` and caches it.

        :param url: endpoint url
        :params \*\*kwargs: kwargs to pass to :func:`requests.request`
        '''
        response = super(Bounces, self)._request(url, **kwargs)
        self._last_response = response
        return response