comefrom: <awangdev>Brick Wall_1.java
code: private boolean validate(List<List<Integer>> wall) {
  
          return wall == null || wall.size() == 0 || wall.get(0) == null || wall.get(0).size() == 0;
      }
masked: private boolean var_0 ( List < List < Integer >> var_3 ) {
    return var_3 == null || var_3 . size ( ) == 0 || var_3 . get ( 0 ) == null || var_3 . get ( 0 ) . size ( ) == 0 ;
  }
  