public Definitions toDefinitions() {
        Definitions definitions = bpmn2.createDefinitions();
        ProcessPropertyWriter pp =
                processConverter.convertProcess();
        definitions.getRootElements().add(pp.getProcess());

        DefinitionsPropertyWriter p = propertyWriterFactory.of(definitions);



        p.setExporter("jBPM Process Modeler");
        p.setExporterVersion("2.0");
        // p.setProcess(pp.getProcess());
        p.setDiagram(pp.getBpmnDiagram());
        p.setRelationship(pp.getRelationship());
        p.addAllRootElements(pp.getItemDefinitions());
        p.addAllRootElements(pp.getRootElements());

        return definitions;
    }