@abc.abstractmethod<EOL><INDENT>def get_qualifiers_by_query(self, qualifier_query):<DEDENT>
return<EOL>
Gets a list of ``Qualifiers`` matching the given search.

        :param qualifier_query: the search query array
        :type qualifier_query: ``osid.authorization.QualifierQuery``
        :return: the returned ``QualifierList``
        :rtype: ``osid.authorization.QualifierList``
        :raise: ``NullArgument`` -- ``qualifier_query`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure
        :raise: ``Unsupported`` -- ``qualifier_query`` is not of this service

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