docs: def get_authorizations_on_date(self, from_, to):
          """Gets an ``AuthorizationList`` effective during the entire given date range inclusive but not confined to the date range.
  
          arg:    from (osid.calendaring.DateTime): starting date
          arg:    to (osid.calendaring.DateTime): ending date
          return: (osid.authorization.AuthorizationList) - the returned
                  ``Authorization`` list
          raise:  InvalidArgument - ``from`` is greater than ``to``
          raise:  NullArgument - ``from`` or ``to`` is ``null``
          raise:  OperationFailed - unable to complete request
          raise:  PermissionDenied - authorization failure occurred
          *compliance: mandatory -- This method must be implemented.*
  
          """
          # Implemented from template for
          # osid.relationship.RelationshipLookupSession.get_relationships_on_date
          authorization_list = []
          for authorization in self.get_authorizations():
              if overlap(from_, to, authorization.start_date, authorization.end_date):
                  authorization_list.append(authorization)
          return objects.AuthorizationList(authorization_list, runtime=self._runtime)