#pragma warning disable CS8764 // Nullability of reference types in return type doesn't match overridden member.
// Neo 2.x is not compiled with C# 8, so not sure why C# compiler thinks
// TryGetInternal can't return null. But it can so suppress the warning.
protected override TValue?TryGetInternal(TKey key)
#pragma warning restore CS8764 // Nullability of reference types in return type doesn't match overridden member.
{
return(tracker.TryGet(key, snapshot));
}