code: public static function find_with_client($client, $id) {
  
      $endpoint = self::$endpoint . '/' . $id;
  
      return new self($client, $client->request('get', $endpoint));
  
    }
docs: Fetch a bill item from the API
  
  @param object $client The client object to use to make the query
  @param string $id The id of the bill to fetch
  
  @return object The bill object