}
/**
- * @param string|NULL $dsn
+ * @param string|null $dsn
* Use NULL to load the default/active connection from CRM_Core_DAO.
* Otherwise, give a full DSN string.
* @param string $fileName
/**
*
- * @param string|NULL $dsn
+ * @param string|null $dsn
* @param string $queryString
* @param string $prefix
* @param bool $dieOnErrors