code: public Map<Object, Node> getWrapperMap(Set<?> objects)
  	{
  		Map<Object, Node> map = new HashMap<Object, Node>();
  
  		for (Object object : objects)
  		{
  			Node node = (Node) getGraphObject(object);
  			if (node != null)
  			{
  				map.put(object, node);
  			}
  		}
  		return map;
  	}
docs: Gets an element-to-wrapper map for the given elements.
  @param objects Wrapped objects
  @return object-to-wrapper map