code: public function recordEntry($url, $parameters)
      {
          $this->dropFuture();
          array_push(
                  $this->sequence,
                  array('url' => $url, 'parameters' => $parameters));
          $this->position++;
      }
docs: Adds a successfully fetched page to the history.
  
  @param SimpleUrl $url                 URL of fetch.
  @param SimpleEncoding $parameters     Any post data with the fetch.