public int[][] eval(int[][] dest, NslInt2 a, NslInt2 b) {
   return eval(dest, a.getint2(), b.getint2());
 }
 public int[][] eval(int a, NslInt2 b) {
   return eval(a, b.getint2());
 }
 public int[][] eval(NslInt2 a, NslInt2 b) {
   return eval(a.getint2(), b.getint2());
 }
 public int[][] eval(NslInt2 a, int b) {
   return eval(a.getint2(), b);
 }