lass)</code></a></div>
</div>
<div class="block">Add a node to the graph that corresponds to a managed type
 with inheritance. This allows for multiple subclass
 subgraphs to be defined for this node of the entity graph.
 Subclass subgraphs will automatically include the specified
 attributes of superclass subgraphs</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>attribute</code> - attribute</dd>
<dd><code>type</code> - entity subclass</dd>
<dt>Returns:</dt>
<dd>subgraph for the attribute</dd>
<dt>T