Latest version of com.typesafe.akka:akka-stream-contrib_2.12
https://javadoc.io/doc/com.typesafe.akka/akka-stream-contrib_2.12
Current version 0.11+2-9a997928
https://javadoc.io/doc/com.typesafe.akka/akka-stream-contrib_2.12/0.11+2-9a997928
package-list path (used for javadoc generation -link option)
https://javadoc.io/doc/com.typesafe.akka/akka-stream-contrib_2.12/0.11+2-9a997928/package-list