@abc.abstractmethod<EOL><INDENT>def get_sequence_rule_enabler_bank_session(self):<DEDENT>
return<EOL>
Gets the ``OsidSession`` to lookup sequence rule enabler/bank mappings for sequence rule enablers.

        :return: a ``SequenceRuleEnablerBankSession``
        :rtype: ``osid.assessment.authoring.SequenceRuleEnablerBankSession``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``Unimplemented`` -- ``supports_sequence_rule_enabler_bank()`` is ``false``

        *compliance: optional -- This method must be implemented if
        ``supports_sequence_rule_enabler_bank()`` is ``true``.*