reivew :: removed Optional to param of _search_by_entity_ids()
reivew :: removed Optional to param of _search_by_entity_ids()

uclouvain/osis,uclouvain/OSIS-Louvain,uclouvain/osis,uclouvain/OSIS-Louvain,uclouvain/osis,uclouvain/OSIS-Louvain,uclouvain/osis