public static void GetColumnTest(
     RefMatrix4x4 matrix,
     int index,
     RefColumn <float, RefMatrix4x4> expected)
 => CollectionAssert.AreEqual(
     expected, matrix.GetColumn <float, RefMatrix4x4>(index));
 public static void GetColumnThrowExceptionIfIndexExceedsColumns(
     RefMatrix4x4 matrix, int index)
 => Assert.Throws <ArgumentOutOfRangeException>(
     () => matrix.GetColumn <float, RefMatrix4x4>(index));