@abc.abstractmethod<EOL><INDENT>def get_sequence_rule_enablers(self):<DEDENT>
return<EOL>
Gets the ``SequenceRuleEnablerList`` resulting from a search.

        :return: the sequence rule enabler list
        :rtype: ``osid.assessment.authoring.SequenceRuleEnablerList``
        :raise: ``IllegalState`` -- list has already been retrieved

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