public static AdminDistributedSystemImpl getConnectedInstance() {
    synchronized (CONNECTION_SYNC) {
      return thisAdminDS;
    }
  }
returns instance of AdminDistributedSystem that is current connected. See
<code>thisAdminDS</code>. (for feature requests #32887)
<p>
TODO: remove this static method during reimplementation of
{@link SystemMemberCacheEventProcessor}
geode-core/src/main/java/org/apache/geode/admin/internal/AdminDistributedSystemImpl.java