[Twisted-Python] Analog to asyncore.dispatcher.handle_write()?

[dkarbott at comcast.net]

Hi,
I'm new to twisted so this may be a simple question.

I want to write a twisted.internet.protocol.Protocol implementation which doesn't write too far ahead of the socket it's writing into.

How do I get a notification when the underlying socket is ready to
write more data?

Any info would be much appreciated.

-- Darrell