transposed

float[6] elements = [1, 2, 3, 4, 5, 6];
float[6] transposedElements = [1, 4, 2, 5, 3, 6];
auto m1 = Mat23.fromColumns(elements);
auto m2 = transposed(m1);
assert(m2.elements == transposedElements);
assert(transposed(m1.transposed) == m1);