title: Is it possible to call client side code from cloud (and not with push notification or live query)
body: <p>I'm using Flutter developing for mobile. I'm using Parse (Back4App) for my back end.</p>
  <p>I do not want either of the following:</p>
  <ol>
  <li>push notifications to solve this</li>
  <li>Parse live query to solve this</li>
  </ol>
  <p>(I'm aware both of the above do solve this, I have need for a different configuration)</p>
  <p>Simple question: can I somehow trigger client-side code from cloud code if app is open? If so how?</p>