title: Dragging between two calendars along with revert() in angular FullCalendar
body: <p>I have two calendars (source and destination), I want to drag an event from <strong>source</strong> to <strong>destination</strong>.</p>
  <p>In the destination calendar, there is an event named <code>eventReceive</code>;
  In this event sometime I need to call <code>revert()</code>. The problem is that <code>info.revert();</code> works in the destination calendar, but I need to also restore the event to the source calendar as well. At the moment, it is removed and there is no obvious way to put it back.</p>
  <p>Is it possible to do that?</p>
  <p><strong>Source</strong></p>
  <pre><code>&lt;full-calendar #sourceCalendar  
      ...
      (eventLeave)=&quot;eventLeave($event)&quot;&gt;
  &lt;/full-calendar&gt;
  </code></pre>
  <p><strong>Destination</strong></p>
  <pre><code>&lt;full-calendar #destinationCalendar
      ...
      (eventReceive)=&quot;eventReceive($event)&quot;&gt;
  &lt;/full-calendar&gt;
  </code></pre>
  <p>In typescript:</p>
  <pre><code>eventReceive($event){
     // sometime I need to revert
     // How to revert ...
  }
  </code></pre>