extern error_t collectionReceive(message_t* m, uint32_t timeout, collection_id_t id);
extern error_t collectionSnoop(message_t* m, uint32_t timeout, collection_id_t id);
extern error_t collectionReceive(message_t* m, uint32_t timeout, collection_id_t id);
extern error_t collectionSnoop(message_t* m, uint32_t timeout, collection_id_t id);