sbt - akka.dispatch.Future not found -

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i trying import akka.dispatch.future in class compiler unable find particular package. 1 it's able find akka.dispatch.futures.

can point out might doing wrong? build.sbt follows:

name := "someapp"  version := "0.1"  scalaversion := "2.10.1"  librarydependencies ++= seq("com.typesafe.akka" %% "akka-actor" % "2.1.2")

it's in docs: http://doc.akka.io/docs/akka/2.1.2/project/migration-guide-2.0.x-2.1.x.html

see "pieces moved scala standard library" section.


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