@abc.abstractmethod<EOL><INDENT>def get_proficiencies_by_genus_type_for_objective(self, objective_id, proficiency_genus_type):<DEDENT>
return<EOL>
Gets a ``ProficiencyList`` relating to the given objective and proficiency genus ``Type``.

        :param objective_id: an objective ``Id``
        :type objective_id: ``osid.id.Id``
        :param proficiency_genus_type: a proficiency genus type
        :type proficiency_genus_type: ``osid.type.Type``
        :return: the returned ``Proficiency`` list
        :rtype: ``osid.learning.ProficiencyList``
        :raise: ``NullArgument`` -- ``objective_id`` or ``proficiency_genus_type`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

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