title: Google App Script getThreads() problem with Gmail conversations - Do not see mails with same title
body: <p>I meet a problem while my script is working perfectly, it is difficult on new threads.
  I have turned off conversations in Gmail, but it still read-only first message at a certain date with the same title. Every time first, even when new mail arrives it see it as the first email received with a certain title. Is there a way to make the app script see new emails with the same title?</p>
  <pre><code>var hbNewLabel = GmailApp.getUserLabelByName(&quot;Example&quot;)
  var hb = hbNewLabel.getThreads()
  var countNew = hb.length
  
    for (a=countNew -1; a&gt;=0; a--){
  var message = hb[a].getMessages()
  var mailText = message[0].getPlainBody()
  
  }
  </code></pre>