title: Leaflet MarkerCluster - how to check if cluster is going to be spiderfied (i.e. has maxZoom level)?
body: <p>I want to implement my own form of spiderfying (HTML popup) so I need to know if cluster is going to be spiderfied (i.e. has a maxZoom level). There is a <code>spiderfied</code> event, but it is fired after a cluster is spiderfied, which is useless for me.</p>
  
  <p>There is a similar question on GIS, but answers don't work for me: <a href="https://gis.stackexchange.com/questions/233041/how-to-determine-if-a-cluster-is-at-its-maxzoom-level">
  How to determine if a cluster is at its maxZoom level?</a></p>
  
  <p>I was examining the event objects after the cluster click, but I haven't found any difference between normal and "ready-to-be-spiderfied" cluster objects.</p>