/**
   * Add exist story to sprint
   *
   * @param storiesId
   */
  public void addExistingStory(ArrayList<Long> storiesId) {
    ProductBacklogLogic productBacklogLogic = new ProductBacklogLogic(mProject);

    if ((mSprintId != 0) && (mSprintId != -1)) {
      // 將 Story 加入 Sprint 當中
      productBacklogLogic.addStoriesToSprint(storiesId, mSprintId);
    }
  }
 /**
  * Get existing stories by release id
  *
  * @return IStory list
  */
 public ArrayList<StoryObject> getExistingStories() {
   ArrayList<StoryObject> stories = null;
   ProductBacklogLogic productBacklogLogic = new ProductBacklogLogic(mProject);
   stories = productBacklogLogic.getExistingStories();
   return stories;
 }