@abc.abstractmethod<EOL><INDENT>def get_proficiency_notification_session_for_objective_bank(self, proficiency_receiver, objective_bank_id):<DEDENT>
return<EOL>
Gets the ``OsidSession`` associated with the proficiency notification service for the given objective bank.

        :param proficiency_receiver: the notification callback
        :type proficiency_receiver: ``osid.learning.ProficiencyReceiver``
        :param objective_bank_id: the ``Id`` of the ``ObjectiveBank``
        :type objective_bank_id: ``osid.id.Id``
        :return: a ``ProficiencyNotificationSession``
        :rtype: ``osid.learning.ProficiencyNotificationSession``
        :raise: ``NotFound`` -- no objective bank found by the given ``Id``
        :raise: ``NullArgument`` -- ``proficiency_receiver`` or ``objective_bank_id`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``Unimplemented`` -- ``supports_proficiency_notification()`` or ``supports_visible_federation()`` is ``false``

        *compliance: optional -- This method must be implemented if
        ``supports_proficiency_notification()`` and
        ``supports_visible_federation()`` are ``true``*