@abc.abstractmethod<EOL><INDENT>def apply_function_query(self, function_query):<DEDENT>
pass<EOL>
Applies a function query to this vault.

        :param function_query: the function query
        :type function_query: ``osid.authorization.FunctionQuery``
        :raise: ``NullArgument`` -- ``function_query`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure occurred
        :raise: ``Unsupported`` -- ``function_query`` not of this service

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