><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></code></div>
<div class="col-second even-row-color"><code><a href="#keySubgraph()" class="member-name-link">keySubgraph</a></code></div>
<div class="col-last even-row-color">
<div class="block">(Optional) If the attribute references a Map type, this element
 can be used to specify a subgraph for the Key in the case of an
 Entity key type.</div