in exposed-jdbc/src/main/kotlin/org/jetbrains/exposed/v1/jdbc/transactions/TransactionManager.kt [265:274]
override fun rollback() {
if (connectionLazy.isInitialized() && !connection.isClosed) {
if (useSavePoints && savepoint != null) {
connection.rollback(savepoint!!)
savepoint = connection.setSavepoint(savepointName)
} else {
connection.rollback()
}
}
}