comefrom: <awangdev>Walls and Gates_4.java
code: private boolean validate(int[][] rooms) {
  
          return rooms == null || rooms.length == 0 || rooms[0] == null || rooms[0].length == 0;
      }
masked: private boolean var_0 ( int [ ] [ ] var_1 ) {
    return var_1 == null || var_1 . length == 0 || var_1 [ 0 ] == null || var_1 [ 0 ] . length == 0 ;
  }
  