=> Result.Plus(Result.Plus(result0, result1, result2, result3, mergeFunc.ThrowIfDefault(nameof(mergeFunc))), Result.Plus(result4, result5, result6, result7, mergeFunc.ThrowIfDefault(nameof(mergeFunc))), mergeFunc.ThrowIfDefault(nameof(mergeFunc))).Map(TupleHelper.Unfold);
=> Result.Plus(result0, Result.Plus(result1, result2, mergeFunc.ThrowIfDefault(nameof(mergeFunc))), mergeFunc.ThrowIfDefault(nameof(mergeFunc))).Map(TupleHelper.Unfold);