def METHOD_NAME(self) -> Dict[datetime.date, set]:
    pmts_submitted = defaultdict(set)
    forms = iter_forms_by_xmlns_received_on(
        self.domain, INDICATORS_FORM_XMLNS,
        midnight_starting(self.startdate),
        midnight_ending(self.enddate),
    )
    for form in forms:
        location_id = form.form_data['location_operation_site']
        pmts_submitted[form.received_on.date()].add(location_id)
    return pmts_submitted