 classes and the callback interfaces registered for each class. If a callback class does not
 implement any recognized callback interfaces, the associated collection of registered interfaces for the class will
 be empty.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/NullPointerException.html?is-external=true" title="class or interface in java.lang" class="externalLink">NullPointerException</a></code> - in case any of the callbac