def __init__(self, domain, oid, case_id):
self.oid = oid
self.case_id = case_id
self.is_repeating = is_study_event_repeating(domain, oid)
self.forms = defaultdict(lambda: defaultdict(list)) # a dict of forms containing a dict of item groups
self.name = get_study_event_name(domain, oid)
self.start_datetime = None
self.end_datetime = None
