Defining Structures in Stateflow

I am trying to define structures to be used in Stateflow. The problem being I have a kind of nested structure.. where one of the element of the structure is a structure of the same type.. this is possible to do in C.

eg:

typedef struct btnode { int count ; int value[4] ; struct btnode *child[4] ; } ;

However, in Stateflow I need to provide the structures as simulink bus objects first which does not allow for such a bus input. The nested structure being a pointer is also a problem. My code is similar to this example code online:

http://www.dailyfreecode.com/Code/which-maintains-b-tree-order-5-2847.aspx