internal ref struct DynamicSpan<T>
        {
            private readonly Span<T> Data;

            internal DynamicSpan(in Span<T> data)
            {
                Data = data;
            }

            public static implicit operator DynamicSpan<T>(in Span<T> data)
            {
                return new DynamicSpan<T>(data);
            }

            internal dynamic this[in int i]
            {
                readonly get { return Data[i]; }
                set { Data[i] = value; }
            }
        }