Calling the function ```transaction { // print...

# getting-started

[zero_coding]

Calling the function

transaction {
    // print sql to std-out
    addLogger(StdOutSqlLogger)

    SchemaUtils.create(Genders)
    SchemaUtils.create(Interests)
    SchemaUtils.create(Users)
    SchemaUtils.create(UserInterests)

}

and signature of the function:

fun <T> transaction(db: Database? = null, statement: Transaction.() -> T): T =

Why do I have not to pass db parameter explicitly