@abc.abstractmethod<EOL><INDENT>def apply_proficiency_query(self, proficiency_query):<DEDENT>
pass<EOL>
Applies a proficiency query to this objective bank.

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

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