mes()" class="member-name-link">getPropertyNames</a>()</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3">
<div class="block">Returns an immutable <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Collection.html" title="class or interface in java.util" class="external-link"><code>collection</code></a> containing the property names available within the
 context of the current request/response exchange contex