gistfile1.scala

trait FancyTrait {
  def withContext(method: => () => Unit) = {
    // define some context here, like:
    val sender = this.sender
    
    // run the method which can see the context
    method()
  }
}

class PimpedOutClass extends FancyTrait {
  def doStuff = {
    withContext {
      sender ! "fun message sent to a variable brought into scope by withContext"
    }
  }
}