title: Find Rangy marker ID
body: <p>I'm attempting to find the markerId value of a saved rangy selection.</p>
  
  <p>I've tried the following:</p>
  
  <pre><code>marker = savedSel.rangeInfos;
  console.log(marker.markerId);
  </code></pre>
  
  <p>But it returns "undefined".
  Outputting the marker variable directly returns an object that clearly has "markerId" as an item.  I just seem to be having trouble getting to that third dimension in the multidimensional object.</p>
  
  <p>How could this be done?</p>