code: public T pages_getInfo(Integer userId, EnumSet<PageProfileField> fields)
      throws FacebookException, IOException {
      if (fields == null || fields.isEmpty()) {
        throw new IllegalArgumentException("fields cannot be empty or null");
      }
      if (userId == null) {
        userId = this._userId;
      }
      return this.callMethod(FacebookMethod.PAGES_GET_INFO,
                             new Pair<String, CharSequence>("uid",    userId.toString()),
                             new Pair<String, CharSequence>("fields", delimit(fields)));
    }
docs: Retrieves the requested profile fields for the Facebook Pages of the user with the given
  <code>userId</code>.
  @param userId the ID of a user about whose pages to fetch info (defaulted to the logged-in user)
  @param fields a set of PageProfileFields
  @return a T consisting of a list of pages, with each page element
  containing the requested fields.
  @see <a href="http://wiki.developers.facebook.com/index.php/Pages.getInfo">
  Developers Wiki: Pages.getInfo</a>