// Only call at the end of the Mainloop or HeartbeatLoop
public void FinishClose()
{
// Notify hearbeat loops that they can leave
m_heartbeatRead.Set();
m_heartbeatWrite.Set();
m_closed = true;
MaybeStopHeartbeatTimers();
m_frameHandler.Close();
m_model0.SetCloseReason(m_closeReason);
m_model0.FinishClose();
}