'Open the stream window by a given increment.
@param streamID: The ID of the stream whose window needs to be opened.
@type streamID: L{int}
@param increment: The amount by which the stream window must be
incremented.
@type increment: L{int}'

def openStreamWindow(self, streamID, increment):

    self.conn.acknowledge_received_data(increment, streamID)
    data = self.conn.data_to_send()
    if data:
        self.transport.write(data)
