PK_ERROR_code_t   PK_GROUP_ask_entity_class
(
--- received arguments ---
PK_GROUP_t        group,            --- group

--- returned arguments ---
PK_CLASS_t *const entity_class      --- class of entity allowed in the group
)


This function returns the class of the entities allowed in the given group.


See PK_GROUP_create_from_entities for the permissable entity classes that
can be collected into groups.

If entity_class is returned as the generic PK_CLASS_entity, use
PK_GROUP_ask_part to distinguish which individual classes are permitted.