class Field {
  Integer[][] arr1 = new Integer[][]{{3, 3, 3}, {3, 3, 3}};
  Integer @Required [][] arr2 = new Integer[][]{{3, 3, 3}, {3, 3, 3}};
  Integer @Required [] @Preliminary @Required [] arr3 = new Integer[][]{{3, 3, 3}, {3, 3, 3}};
  Integer @Preliminary @Required [] @Required [] arr4 = new Integer[][]{{3, 3, 3}, {3, 3, 3}};
  Integer[] @Required [] arr5 = new Integer[][]{{3, 3, 3}, {3, 3, 3}};
  Integer @Preliminary [][] arr6;
}