* Isolation levels can be set per-transaction by passing `options.isolationLevel` to `sequelize.transaction`.
* Isolation levels can be set per-transaction by passing `options.isolationLevel` to `sequelize.transaction`.
* Default to `REPEATABLE_READ` but you can override the default isolation level by passing `options.isolationLevel` in `new Sequelize`.
* Sequelize uses the default isolation level of the database, you can override this by passing `options.isolationLevel` in Sequelize constructor options.
*
*
* Pass in the desired level as the first argument:
* Pass in the desired level as the first argument: