/**
  * This checks the cache for an existing inventory. If it exists it is
  * returned. Otherwise a new inventory is created.
  *
  * @param string $steamId The 64bit Steam ID or vanity URL of the user
  * @param bool $fetchNow Whether the data should be fetched now
  * @param bool $bypassCache Whether the cache should be bypassed
  * @return DotA2BetaInventory The inventory created from the given options
  */
 public static function createInventory($steamId, $fetchNow = true, $bypassCache = false)
 {
     return parent::create(self::APP_ID, $steamId, $fetchNow, $bypassCache);
 }