code: public EntityGraph getDefaultGraph(final Session session)
  	{
  		if (this.defaultExpandGraph == null)
  		{
  			final EntityGraph<?> graph = session.createEntityGraph(clazz);
  
  			populateGraph(graph, getEagerFetch());
  
  			this.defaultExpandGraph = graph;
  
  			return graph;
  		}
  		else
  		{
  			return this.defaultExpandGraph;
  		}
  	}
docs: Build or return the default Entity Graph that represents defaultExpand
  
  @param session
  
  @return