@abc.abstractmethod<EOL><INDENT>def get_offset_events_by_genus_type(self, offset_event_genus_type):<DEDENT>
return<EOL>
Gets an ``OffsetEventList`` corresponding to the given offset event genus ``Type`` which does not include
        offset events of genus types derived from the specified ``Type``.

        :param offset_event_genus_type: an offset event genus type
        :type offset_event_genus_type: ``osid.type.Type``
        :return: the returned ``OffsetEvent`` list
        :rtype: ``osid.calendaring.OffsetEventList``
        :raise: ``NullArgument`` -- ``offset_event_genus_type`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

        *compliance: mandatory -- This method must be implemented.*