scala - Where is GuiceApplicationBuilder? -

i trying set play2 application dependency injection, information the official docs. however, ide cannot find guiceapplicationbuilder. additional entry librarydependencies have specify builder?

edit: made screenshot of happens when try import things stated @anquegi

edit 2: problem simple: used wrong version of play - 2.3.8 did in fact not have these, had use 2.4.0-rc2 work.

at dependencies in play docs /scaladependencyinjection must import this

import play.api.applicationloader import play.api.configuration import play.api.inject._ import play.api.inject.guice._ 

this compile code in section advanced: extending guiceapplicationloader, need use extending in class:

import play.api.applicationloader import play.api.configuration import play.api.inject._ import play.api.inject.guice._  class customapplicationloader extends guiceapplicationloader() {   override def builder(context: applicationloader.context): guiceapplicationbuilder = {     val = configuration("a" -> 1)     initialbuilder       .in(context.environment)       .loadconfig(extra ++ context.initialconfiguration)       .overrides(overrides(context): _*)   } }