@abc.abstractmethod<EOL><INDENT>def apply_proficiency_sequencing(self, proficiency_search_order):<DEDENT>
pass<EOL>
Applies a proficiency search order to this objective bank.

        :param proficiency_search_order: the proficiency search order
        :type proficiency_search_order: ``osid.learning.ProficiencySearchOrder``
        :raise: ``NullArgument`` -- ``proficiency_search_order`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure occurred
        :raise: ``Unsupported`` -- ``proficiency_search_order`` not of this service

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