如何使用akka stream alpakka编写带头部的CSV文件？

import akka.actor.ActorSystem
import akka.stream.ActorMaterializer
import akka.stream.alpakka.csv.scaladsl.CsvFormatting
import akka.stream.scaladsl.{FileIO, Source}
import akka.util.ByteString

import scala.concurrent.ExecutionContext.Implicits.global

object CsvWriterExample extends App {
  implicit val system: ActorSystem = ActorSystem("CsvWriterExample")
  implicit val materializer: ActorMaterializer = ActorMaterializer()

  val header: List[String] = List("Name", "Age", "Email")
  val data: List[List[String]] = List(
    List("John", "25", "john@example.com"),
    List("Alice", "30", "alice@example.com"),
    List("Bob", "35", "bob@example.com")
  )

  val csvSource: Source[List[String], Any] = Source(data)

  val csvWithHeaderSource: Source[List[String], Any] = Source.single(header) ++ csvSource

  val csvFormattedSource: Source[ByteString, Any] = csvWithHeaderSource
    .via(CsvFormatting.format())

  val outputFile = "output.csv"

  val csvFileSink = FileIO.toPath(outputFile)

  val csvWritingPipeline = csvFormattedSource.runWith(csvFileSink)

  csvWritingPipeline.onComplete { _ =>
    system.terminate()
  }
}