'Send soap message.  Implementations are expected to handle:
- proxies
- I{http} headers
- cookies
- sending message
- brokering exceptions into L{TransportError}
@param request: A transport request.
@type request: L{Request}
@return: The reply
@rtype: L{Reply}
@raise TransportError: On all transport errors.'

def send(self, request):

    raise Exception('not-implemented')
