title: Impact of changes on singleton class loaded by different classloaders
body: <p>If i have multiple instances of singleton class on different class loaders<br>
  and if i have modifications to a reference variable in any of these instances.  </p>
  
  <p>E.g if i add/remove an element to Hashmap   </p>
  
  <p>Does the change/modification impact the instances on other class loaders as well?  </p>