def http_session(self):
        """HTTP Session property

        :return: vk_requests.utils.VerboseHTTPSession instance
        """
        if self._http_session is None:
            session = VerboseHTTPSession()
            session.headers.update(self.DEFAULT_HTTP_HEADERS)
            self._http_session = session
        return self._http_session
HTTP Session property

        :return: vk_requests.utils.VerboseHTTPSession instance