til"><code>collection</code></a> containing the
 property names available within the context of the current configuration instance.
 <p>
 Use the <a href="../../../../javax/ws/rs/core/Configuration.html#getProperty-java.lang.String-"><code>getProperty(java.lang.String)</code></a> method with a property name to get the value of
 a property.
 </p></div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>an immutable <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-exter