comefrom: <awangdev>350. Intersection of Two Arrays II_2.java
code: private int[] convertToArray(List<Integer> list) {
  
          int[] rst = new int[list.size()];
          for (int i = 0; i < list.size(); i++) {
              rst[i] = list.get(i);
          }
          return rst;
      }
masked: private int [ ] sample_funcname ( List < Integer > var_2 ) {
    int [ ] var_4 = new int [ var_2 . size ( ) ] ;
    for ( int var_6 = 0 ;
    var_6 < var_2 . size ( ) ;
    var_6 ++ ) {
      var_4 [ var_6 ] = var_2 . get ( var_6 ) ;
    }
    return var_4 ;
  }
  