Latest version of com.typesafe.akka:akka-testkit_2.11.0-RC1
https://javadoc.io/doc/com.typesafe.akka/akka-testkit_2.11.0-RC1
Current version 2.3.0-RC4
https://javadoc.io/doc/com.typesafe.akka/akka-testkit_2.11.0-RC1/2.3.0-RC4
package-list path (used for javadoc generation -link option)
https://javadoc.io/doc/com.typesafe.akka/akka-testkit_2.11.0-RC1/2.3.0-RC4/package-list