ject to removal in a future version.</span>
<div class="deprecation-comment">use <a href="#addMapKeySubgraph(jakarta.persistence.metamodel.MapAttribute)"><code>addMapKeySubgraph(MapAttribute)</code></a></div>
</div>
<div class="block">Add a node to the graph that corresponds to a map key
 that is a managed type. This allows for construction of
 multi-node entity graphs that include related managed types.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>attribute</code> - attribute</dd>
<dt>Returns:</