You should be using scala.collection.JavaConverters instead, as it makes the conversion explicit (by adding a ".asScala"/".asJava" method to collections). Impl

You should be using scala.collection.JavaConverters instead, as it makes the conversion explicit (by adding a ".asScala"/".asJava" method to collections). Implicit conversions (i.e. where a type is silently converted to another type) is dangerous and can lead to very surprising problems.