onCongestionWindowUpdate abstract method
Called when the congestion window is updated.
cid is the connection ID.
oldCwnd is the previous congestion window size.
newCwnd is the new congestion window size.
reason describes why the window changed (e.g., "ack", "loss", "timeout").
Implementation
void onCongestionWindowUpdate(ConnectionId cid, int oldCwnd, int newCwnd, String reason);