s="member-signature"><span class="modifiers">public abstract</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">isListenerForSource</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a>&nbsp;source)</span></div>
<div class="block"><p>
 This method must return <code>true</code> if and only if this listener instance is interested