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_0 ) {
    int [ ] var_1 = new int [ var_0 . size ( ) ] ;
    for ( int var_2 = 0 ;
    var_2 < var_0 . size ( ) ;
    var_2 ++ ) {
      var_1 [ var_2 ] = var_0 . get ( var_2 ) ;
    }
    return var_1 ;
  }
  