def export_data_object_info(bpmn_diagram, data_object_params, output_element):
        """
        Adds DataObject node attributes to exported XML element

        :param bpmn_diagram: BPMNDiagramGraph class instantion representing a BPMN process diagram,
        :param data_object_params: dictionary with given subprocess parameters,
        :param output_element: object representing BPMN XML 'subprocess' element.
        """
        output_element.set(consts.Consts.is_collection, data_object_params[consts.Consts.is_collection])