This method is called after request(), to add additional data to the
        body of the request.  So if that happens, let's just append the data
        onto the most recent request in the cassette.

def send(self, data):
        '''
        This method is called after request(), to add additional data to the
        body of the request.  So if that happens, let's just append the data
        onto the most recent request in the cassette.
        '''
        self._vcr_request.body = self._vcr_request.body + data \
            if self._vcr_request.body else data