public static IEnumerable <T> seq <L, T>(EitherUnsafe <L, T> value) =>
 value.RightAsEnumerable();
 /// <summary>
 /// Project the Either into an IQueryable of R
 /// </summary>
 /// <typeparam name="L">Left</typeparam>
 /// <typeparam name="R">Right</typeparam>
 /// <param name="either">Either to project</param>
 /// <returns>If the Either is in a Right state, an IQueryable of R with one item.  A zero length IQueryable R otherwise</returns>
 public static IQueryable <R> rightToQuery <L, R>(EitherUnsafe <L, R> either) =>
 either.RightAsEnumerable().AsQueryable();