JDBI.inTransactionUnchecked function behaviour in Kotlin

Question

Wanted to understand the behaviour on the JDBI.inTransactionUnchecked method.

Existing implementation attaches the DAO layers in the transaction context and then fetches the data from the DB.

Code Sample:

jdbi.inTransactionUnchecked {
    val userDAO = it.attach<userDAO>() // Is it really necessary to attach userDAO to this transaction context for it to work correctly? or is there any implication of not attaching it?
    userDAO.updateUserStatus(users)
}

I tried checking the official documentation related to this function (https://jdbi.org/apidocs-kotlin/jdbi3-kotlin/jdbi3-kotlin/org.jdbi.v3.core.kotlin/in-transaction-unchecked.html) but I couldn't find anything.