title: Ambiguous use of "observe" (Swift Compiler Error)
body: <p>I am trying to load messages from Firebase but its telling me "Ambiguous use of observe"</p>
  
  <p>Please help...new to IOS</p>
  
  <pre><code> func fetchMessages(){
      let messageDB = Database.database().reference().child("Messages")
  
  
      messageDB.observe(.childAdded) { (snapshot) in
          let snapshotValue = snapshot.value as! Dictionary&lt;String,String&gt;
          let message = Message()
          message.messageBody = snapshotValue["MessageBody"]!
          message.sender = snapshotValue["Sender"]!
          self.messageArray.append(message)
          self.configureTableView()
          self.messageTableView.reloadData()
  </code></pre>