WithTx should accept a DBTX interface instance, not a concrete *sql.Tx or pgx.Tx for Go.

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What do you want to change?

Currently, when the WithTx method is generated, it accepts a concrete type: either an *sql.Tx or a pgx.Tx. However, the arguments ends up being assigned to a DBTX-typed field. The argument then should also be of type DBTX

What database engines need to be changed?

PostgreSQL

What programming language backends need to be changed?

Go