responds to a collection element
 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>attributeName</code> - name of the attribute</dd>
<dt>Returns:</dt>
<dd>subgraph for the element attribute</dd>
<dt>Throws:</dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/IllegalArgumentException.html" title="class or interface in java.lang" class="externa