defined by
 <a href="../../../../javax/faces/component/behavior/ClientBehaviorHolder.html" title="interface in javax.faces.component.behavior"><code>ClientBehaviorHolder</code></a> to simplify subclass
 implementations. Subclasses that wish to support the
 <a href="../../../../javax/faces/component/behavior/ClientBehaviorHolder.html" title="interface in javax.faces.component.behavior"><code>ClientBehaviorHolder</code></a> contract must declare that the
 subclass implements <a href="../../../../javax/faces/c