title: Is it possible to receive a tuple inside an actor without the warning "eliminated by erasure"
body: <p>I wonder if it is possible to receive a tuple inside an actor, without receiving this warning: </p>
  
  <pre><code>non-variable type argument Long in type pattern (Long, Int) is unchecked since it is eliminated by erasure
  </code></pre>
  
  <p>although the code seems to be valid and works:</p>
  
  <pre><code>override def receive: Receive = {
    case tuple: (Long, DateTime) =&gt; sendPlace(tuple._1, tuple._2)
  }
  </code></pre>
  
  <p>Am I missing something?</p>