jboner/akka — comment on commit 0dc161c800964fe795e0d38f9a6e75d3ea25a300
File: akka-actor/src/main/scala/akka/routing/Routing.scala line 178
By rkuhn:

different proposal: simply make `within` abstract in ScatterGatherFirstCompletedLike, so that it will be picked up from ScatterGatherFirstCompletedRouter; apply the same treatment to nrOfInstances and routees, since custom routers do not really have to do this if they don’t want to.