def create_collection_summary(collection_id, contributor_id_to_add):
 collection = get_collection_by_id(collection_id)
 collection_summary = compute_summary_of_collection(collection, contributor_id_to_add)
 save_collection_summary(collection_summary)

def create_collection_summary ( collection_id , contributor_id_to_add ) : collection = get_collection_by_id ( collection_id ) collection_summary = compute_summary_of_collection ( collection , contributor_id_to_add ) save_collection_summary ( collection_summary )
creates and stores a summary of the given collection .