public function on_elements_end() {

        foreach ($this->mappings as $mapping) {
            $this->write_xml('workshopform_numerrors_map', $mapping, array('/workshopform_numerrors_map/id'));
        }

        foreach ($this->dimensions as $dimension) {
            $this->write_xml('workshopform_numerrors_dimension', $dimension, array('/workshopform_numerrors_dimension/id'));
        }
    }