 in jakarta.persistence">Subgraph</a>&lt;K&gt;</span>&nbsp;<span class="element-name">addMapKeySubgraph</span><wbr><span class="parameters">(<a href="metamodel/MapAttribute.html" title="interface in jakarta.persistence.metamodel">MapAttribute</a>&lt;? super <a href="Graph.html" title="type parameter in Graph">T</a>,<wbr>K,<wbr>?&gt;&nbsp;attribute)</span></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