class="arguments"><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;ns,
<a href="../../../../../jakarta/faces/view/facelets/Tag.html" title="class in jakarta.faces.view.facelets">Tag</a>&nbsp;t)</span></div>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="TagLibrary.html#containsNamespace(java.lang.String,jakarta.faces.view.facelets.Ta