Retrieve raw email dump for this bounce.

        :param sender: A :class:`BounceDump` object to get dump with.
            Defaults to `None`.
        :param \*\*kwargs: Keyword arguments passed to
            :func:`requests.request`.

def dump(self, sender=None, **kwargs):
        '''Retrieve raw email dump for this bounce.

        :param sender: A :class:`BounceDump` object to get dump with.
            Defaults to `None`.
        :param \*\*kwargs: Keyword arguments passed to
            :func:`requests.request`.
        '''
        if sender is None:
            if self._sender is None:
                sender = _default_bounce_dump
            else:
                sender = BounceDump(api_key=self._sender.api_key,
                                    test=self._sender.test,
                                    secure=self._sender.secure)
        return sender.get(self.id, **kwargs)