PK_ERROR_code_t       PK_PART_ask_ref_instances
(
--- received arguments ---
PK_PART_t             part,            --- a part

--- returned arguments ---
int            *const n_instances,     --- number of instances (>=0)
PK_INSTANCE_t **const instances        --- instances ( optional )
)


This function returns the set of instances which instance the given part.


The output array instances is optional. If it is set to NULL, the function
will only compute the number of instances referencing the part.