def export_xml_file_no_di(self, directory, filename):
bpmn_export.BpmnDiagramGraphExport.export_xml_file_no_di(directory, filename, self)<EOL>
Exports diagram inner graph to BPMN 2.0 XML file (without Diagram Interchange data).

:param directory: strings representing output directory,
:param filename: string representing output file name.