public async Task <TFact> Fact <TFact>(TFact prototype) where TFact : class
{
if (prototype == null)
{
throw new ArgumentNullException(nameof(prototype));
}
var graph = factManager.Serialize(prototype);
await factManager.Save(graph, default(CancellationToken));
return(factManager.Deserialize <TFact>(graph, graph.Last));
}
