docs: public static Request newPostOpenGraphActionRequest(Session session, OpenGraphAction openGraphAction,
              Callback callback) {
          if (openGraphAction == null) {
              throw new FacebookException("openGraphAction cannot be null");
          }
          if (Utility.isNullOrEmpty(openGraphAction.getType())) {
              throw new FacebookException("openGraphAction must have non-null 'type' property");
          }
  
          String path = String.format(MY_ACTION_FORMAT, openGraphAction.getType());
          return newPostRequest(session, path, openGraphAction, callback);
      }