de>addAttributeNode(java.lang.String)</code></a> or <a href="#addSubgraph(jakarta.persistence.metamodel.Attribute)"><code>addSubgraph(jakarta.persistence.metamodel.Attribute&lt;? super T, X&gt;)</code></a>.
 If there is no existing node for the given attribute, this
 operation has no effect.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>attribute</code> - attribute</dd>
<dt>Since:</dt>
<dd>3.2</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="removeAttributeNodes(jakarta.persistence.met