class TestCase::Matrix4_16d : mulnum_t {
has x11 : double;
has x21 : double;
has x31 : double;
has x41 : double;
has x12 : double;
has x22 : double;
has x32 : double;
has x42 : double;
has x13 : double;
has x23 : double;
has x33 : double;
has x43 : double;
has x14 : double;
has x24 : double;
has x34 : double;
has x44 : double;
}