in exposed-r2dbc/src/main/kotlin/org/jetbrains/exposed/v1/r2dbc/transactions/TransactionManager.kt [231:240]
override suspend fun rollback() {
if (connectionLazy.isInitialized() && !connection().isClosed()) {
if (useSavePoints && savepoint != null) {
connection().rollback(savepoint!!)
savepoint = connection().setSavepoint(savepointName)
} else {
connection().rollback()
}
}
}