how to set bpmndi:BPMNEdge dynamic ? I want to Dynamic Deploy the workflow by BpmnModel. i have a trick to set it negative position like this: <code> <bpmndi:BPMNEdge bpmnElement="subprocess-useTask-SL" id="BPMNEdge_subprocess-useTask-SL"> <omgdi:waypoint x="-20.0" y="-20.0"></omgdi:waypoint> <omgdi:waypoint x="-20.0" y="-20.0"></omgdi:waypoint> </bpmndi:BPMNEdge> </code>