How to show popup on click leaflet cluster group
<p>I have leaflet map with clustergroup  and its working fine. I want to open popup on clustergroup click. On end marker (element) onclick popup is worning fine. </p>

<p>I am able to capture clustergroup click event also but not able to open popup .</p>

<pre><code>    //To create cluster
          this.markers =  L.markerClusterGroup(); 

          //On cluster click get all children
          this.markers.on('clusterclick', function (a) {
             this.getClusterData(a.layer.getAllChildMarkers());
            //All children is available of cluster when clicked
        },this); 
</code></pre>

<p>But not able to open popup. </p>