code: @SuppressWarnings("unchecked")
  	public void addActivityStream(final List<JSONObject> activities) {
  		final JSONArray items = new JSONArray();
  		for (JSONObject activity : activities) {
  			items.add(activity);
  		}
  		this.json.put("items", items);
  	}
docs: add the news stream according to the Activitystrea.ms format
  
  @param activities
  news stream items