http://docs.scala-lang.org/overviews/collections/conversions-between-java-and-scala-collections.html
http://www.scala-lang.org/api/current/scala/collection/JavaConverters$.html

import scala.collection.JavaConverters._

??? obsolete ???
//import scala.collection.JavaConversions._


https://github.com/scala/scala-java8-compat
https://github.com/scalaj/scalaj-collection

//config.entrySet().asScala.foreach { log.info("e: {}", _) }