// this checks non-empty arrays of references and full instances// june 2023 // 2x2 array of SinOsc refsSinOsc @ foo[2][2]; // 2x2 array of SinOsc instancesSinOsc bar[2][2]; // testif( foo[1][1] == null && bar[1][1] != null )     <<< "success" >>>;else    <<< foo[1][1], bar[1][1] >>>;