// IMPORTANT: don't cache a reference to `other` or `other.Handler` here.
// We need to allow it to be GC'ed.
public ExpiredHandlerTrackingEntry(ActiveHandlerTrackingEntry other)
{
Key = other.Key;
_livenessTracker = new WeakReference(other.Handler);
InnerHandler = other.Handler.InnerHandler;
}
protected virtual void StartHandlerEntryTimer(ActiveHandlerTrackingEntry entry) => entry.StartExpiryTimer(_expiryCallback);