@abc.abstractmethod<EOL><INDENT>def get_offset_event(self, offset_event_id):<DEDENT>
return<EOL>
Gets the ``OffsetEvent`` specified by its ``Id``.

        :param offset_event_id: ``Id`` of the ``OffsetEvent``
        :type offset_event_id: ``osid.id.Id``
        :return: the offset event
        :rtype: ``osid.calendaring.OffsetEvent``
        :raise: ``NotFound`` -- ``offset_event_id`` not found
        :raise: ``NullArgument`` -- ``offset_event_id`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

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