java.lang.NullPointerException
        at org.netbeans.api.visual.widget.Widget.addChild(Widget.java:235)
        at org.netbeans.api.visual.widget.Widget.addChild(Widget.java:226)
        at org.netbeans.modules.xml.wsdl.ui.view.grapheditor.widget.RequestReplyOperationWidget.getVerticalWidget(RequestReplyOperationWidget.java:89)
        at org.netbeans.modules.xml.wsdl.ui.view.grapheditor.widget.OperationWidget.setRightSided(OperationWidget.java:195)
        at org.netbeans.modules.xml.wsdl.ui.view.grapheditor.widget.OperationWithFaultWidget.setRightSided(OperationWithFaultWidget.java:68)
        at org.netbeans.modules.xml.wsdl.ui.view.grapheditor.OperationSceneLayer.renderOperations(OperationSceneLayer.java:192)
        at org.netbeans.modules.xml.wsdl.ui.view.grapheditor.OperationSceneLayer.access$400(OperationSceneLayer.java:85)
        at org.netbeans.modules.xml.wsdl.ui.view.grapheditor.OperationSceneLayer$.run(OperationSceneLayer.java:157)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)