Whether or not we're still processing rows.
Defaults to true (processing rows), but is set to false once
rounds has been visited.
Visits a row. If we're still visiting (i.e. rounds hasn't been reached) then we pass that row to derived classes for processing.
Optionalblock: AbstractBlockProtectedvisit
Simple visitor that logs rows to the console
All visited rows are output via
console.log(). This visitor is useful for easily discovering what rows are being generated.