code: public boolean pages_isAdmin(Long pageId)
      throws FacebookException, IOException {
      return extractBoolean(this.callMethod(FacebookMethod.PAGES_IS_ADMIN,
                                            new Pair<String, CharSequence>("page_id",
                                                                           pageId.toString())));
    }
docs: Checks whether the logged-in user for this session is an admin of the page
  with the given <code>pageId</code>.
  @param pageId the ID of the page
  @return true if the logged-in user is an admin
  @see <a href="http://wiki.developers.facebook.com/index.php/Pages.isAdmin">
  Developers Wiki: Pages.isAdmin</a>