public Refund Update(Refund update) => Update(DateTime.Now, update);
public Refund Create(Refund create) => Create(DateTime.Now, create);
public Refund Update(DateTime time, Refund update) => UpdateMany(time, new[] { update })[0];
public Refund Create(DateTime time, Refund create) => CreateMany(time, new[] { create })[0];