Finding Stateflows under Library links

Greetings,

I wasn't able to find a related topic so here goes : I wanted to use the following method to search for stateflows :

rt = sfroot;
model = rt.find('-isa','Simulink.BlockDiagram','-and','Name',bdroot);
chartObj = model.find('-isa','Stateflow.Chart');

This would have been ideal, but for some reason, none of the stateflow charts inside library links can be found.

An alternative is to use the conventional find_system() with the FollowLinks switch. But I was wondering if I can use the first method and use some such switch to look inside library links. I would prefer the first method because I can work directly with the stateflow object and read out data types of the input and output signals.

Regards,

Sanat