@abc.abstractmethod<EOL><INDENT>def get_calendars_by_provider(self, resource_id):<DEDENT>
return<EOL>
Gets a ``CalendarList`` for the given provider.

        In plenary mode, the returned list contains all known calendars
        or an error results. Otherwise, the returned list may contain
        only those calendars that are accessible through this session.

        :param resource_id: a resource ``Id``
        :type resource_id: ``osid.id.Id``
        :return: the returned ``Calendar`` list
        :rtype: ``osid.calendaring.CalendarList``
        :raise: ``NullArgument`` -- ``resource_id`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

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