in quickstart-flink/quickstart-connector/src/main/scala/org/apache/streampark/flink/quickstart/connector/KafkaSinkApp.scala [32:37]
override def handle(): Unit = {
val source = new BehaviorSource()
val ds = context.addSource[Behavior](source).map(_.toString)
ds.print()
KafkaSink().sink(ds)
}