code: def responses_of(self, request):
          
          responses = [response for index, response in self._responses(request)]
  
          if responses:
              return responses
          # The cassette doesn't contain the request asked for.
          raise UnhandledHTTPRequestError(
              "The cassette (%r) doesn't contain the request (%r) asked for"
              % (self._path, request)
          )
docs: Find the responses corresponding to a request.
          This function isn't actually used by VCR internally, but is
          provided as an external API.