void HistoricalPositionAddedMessage(object?sender, HistoricalPositionAddedEventArgs e)
{
historyManager?.AddPosition(e.Position);
}
protected virtual void OnHistoricalPositionAddedMessage(HistoricalPositionAddedEventArgs e)
{
EventHandler <HistoricalPositionAddedEventArgs>?handler = HistoricalPositionAddedMessage;
handler?.Invoke(this, e);
}
