code: public boolean addQuickReplies(List<QuickReply> quickReplyList) {
      if (quickReplies == null) {
        quickReplies = new ArrayList<>();
      }
  
      checkPrecondition(quickReplyList.size());
  
      return quickReplies.addAll(quickReplyList);
    }
docs: add list of {@code QuickReply} objects to the list of QuickReplies
  
  @param quickReplyList
  the list QuickReplies you like to add
  @return