How to get the list of SparkListeners in Spark using Scala

How can I get the list of current added listeners. Similar to the streamings listeners spark.streams.listListeners. I have found the following but in scala that attribute is not found. https://github.com/apache/spark/pull/16382/files. sc.listenerBus.listeners.contains(sparkListener1). There is no listeners attirbute in scala.