title: In Message.builder , builder() is showing unresolved reference?
body: <p>I'm using fcm to send notification from the my android app and i have implemented all the libraries it asked me.</p>
  
  <pre><code>            val topic = "highScores"
  
  // See documentation on defining a message payload.
              val message = Message.builder()
                      .putData("score", "850")
                      .putData("time", "2:45")
                      .setTopic(topic)
                      .build()
  
  // Send a message to the devices subscribed to the provided topic.
              val response = FirebaseMessaging.getInstance().send(message)
  // Response is a message ID string.
              println("Successfully sent message: " + response)
  </code></pre>
  
  <p>i'm using this code to send the notification but builder is showing unresolved.</p>