/**
  * Save changes on session data back to storage.
  *
  * @access public
  */
 function commit()
 {
     syncml_logger::get_instance()->log_data("saved session data", $this->session_data);
     $GLOBALS['phpgw']->session->appsession('session_data', 'syncml', $this->session_data);
     $sosession = new syncml_sosession();
     $sosession->set_next_nonce($this->id, $this->next_nonce);
 }