'Called by the L{H2Connection} when this stream\'s flow control window
has been opened.'

def windowUpdated(self):

    if (not self.producer):
        return
    if self._producerProducing:
        return
    remainingWindow = self._conn.remainingOutboundWindow(self.streamID)
    if (not (remainingWindow > 0)):
        return
    self._producerProducing = True
    self.producer.resumeProducing()
