
 <a href="../../../../javax/ws/rs/core/Feature.html" title="interface in javax.ws.rs.core"><code>features</code></a>) has been previously registered in the runtime configuration context.
 <p>
 Method returns <code>true</code> only in case an instance equal to the <code>component</code>
 instance is already present among the components previously registered in the configuration
 context.
 </p></div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>component</code> - a component instance t