title: popBackStack with Pass Parse Object
body: <p>I have an <code>Activity A</code>. <code>Activity A</code> calls fragment <code>frag1</code>. <code>frag1</code> calls fragment <code>frag2</code>. Lastly <code>frag2</code> calls <code>frag3</code>. </p>
  
  <p>When I click on a button in <code>frag3</code>, I want to call <code>frag1</code>, pass and parse an object from <code>frag3</code> to <code>frag1</code>. I tried to do this with an object bundle sent from <code>frag3</code> to <code>frag1</code>.</p>
  
  <p>I see that there is a <code>popBackStack()</code> method. However, I am a little confused on how this would work. Is it safe to use this method?</p>
  
  <p>I do not know how to do it.
  Thanks in advance.</p>