Declare a variable of type int named idx set idx to the index where complete is found in watch list or -1 if it is not in watch List//This may or may not be possible in one line of code if idx IS equal to 1

 boolean code() {
       int idx = -1;
      
       int completed=0;
      
       ArrayList<Integer> watchList = new ArrayList<Integer>();
      
       // populateWatchlist
       // Please write your method to populate the watchlist
      
       // if completed is found in watchlist, Its index is returned
       // else -1 is returned which is kept in idx.
       idx = watchList.indexOf(completed);
      
       // if idx=-1, return false
       if(idx == -1)
           return false;
      
       // media Selection object should be a type of element type,
       // because we need to store the removed element.
       // hence taking type of MediaSelection object as Integer here
       Integer ms;
       ms = watchList.remove(idx);
      
       // if ms is serializable
       if(ms.isSerialized()) {
           // add ms to the start of the watchlist
           // 0 represents that we are adding the element at the start
           watchList.add(0, ms);
       }
      
       // return true finally
       return true;
   }