...but they are declared [`[StructLayout(LayoutKind.Sequential, Size = 16)]`](https://github.com/john-h-k/MathSharp/blob/0ebf7031ab1fd05d3c52183d9c3bc6d0c8e17d71/sources/MathSharp/Vector/VectorStorageType.Double.cs#L153).
