e">&lt;X&gt;&nbsp;<a href="Subgraph.html" title="interface in jakarta.persistence">Subgraph</a>&lt;X&gt;&nbsp;addKeySubgraph&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;attributeName)</pre>
<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 rel