java.lang.IllegalArgumentException: fileObject == null
        at org.netbeans.api.java.source.JavaSource.forFileObject(JavaSource.java:220)
        at org.netbeans.modules.websvc.rest.nodes.OpenCookieFactory$OpenCookieImpl.<init>(OpenCookieFactory.java:94)
        at org.netbeans.modules.websvc.rest.nodes.OpenCookieFactory.create(OpenCookieFactory.java:73)
        at org.netbeans.modules.websvc.rest.nodes.OpenCookieFactory.create(OpenCookieFactory.java:65)
        at org.netbeans.modules.websvc.rest.nodes.RestServiceNode.<init>(RestServiceNode.java:80)
        at org.netbeans.modules.websvc.rest.nodes.RestServiceNode.<init>(RestServiceNode.java:66)
        at org.netbeans.modules.websvc.rest.nodes.RestServicesChildren$5.run(RestServicesChildren.java:165)
        at org.netbeans.modules.websvc.rest.nodes.RestServicesChildren$5.run(RestServicesChildren.java:159)
        at org.netbeans.modules.websvc.rest.model.impl.RestServicesMetadataModelImpl$1.call(RestServicesMetadataModelImpl.java:76)
        at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.AnnotationModelHelper.runCallable(AnnotationModelHelper.java:252)
        at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.AnnotationModelHelper.access$100(AnnotationModelHelper.java:82)
        at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.AnnotationModelHelper$2.run(AnnotationModelHelper.java:183)
        at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.AnnotationModelHelper$2.run(AnnotationModelHelper.java:181)
        at org.netbeans.api.java.source.JavaSource$MimeTask.run(JavaSource.java:517)
        at org.netbeans.modules.parsing.api.ParserManager$MimeTaskAction.run(ParserManager.java:335)
        at org.netbeans.modules.parsing.api.ParserManager$MimeTaskAction.run(ParserManager.java:319)
        at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:189)
        at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:307)
        at org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:384)
        at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:376)
        at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.AnnotationModelHelper.runJavaSourceTask(AnnotationModelHelper.java:181)
        at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.AnnotationModelHelper.runJavaSourceTask(AnnotationModelHelper.java:150)
        at org.netbeans.modules.websvc.rest.model.impl.RestServicesMetadataModelImpl.runReadAction(RestServicesMetadataModelImpl.java:74)
        at org.netbeans.modules.websvc.rest.nodes.RestServicesChildren.createNodes(RestServicesChildren.java:159)
        at org.openide.nodes.Children$Keys$KE.nodes(Children.java:1610)
        at org.openide.nodes.ChildrenArray.nodesFor(ChildrenArray.java:156)
        at org.openide.nodes.EntrySupport$Default$Info.nodes(EntrySupport.java:922)
        at org.openide.nodes.EntrySupport$Default.justComputeNodes(EntrySupport.java:244)
        at org.openide.nodes.ChildrenArray.nodes(ChildrenArray.java:86)
        at org.openide.nodes.EntrySupport$Default.getNodes(EntrySupport.java:174)
        at org.openide.nodes.EntrySupport$Default.getNodes(EntrySupport.java:219)
        at org.openide.nodes.Children.getNodes(Children.java:441)
        at org.openide.nodes.FilterNode$Children$DefaultSupport.updateKeys(FilterNode.java:1686)
        at org.openide.nodes.FilterNode$Children$DefaultSupport.update(FilterNode.java:1673)
        at org.openide.nodes.FilterNode$Children.addNotifyImpl(FilterNode.java:1467)
        at org.openide.nodes.FilterNode$Children.addNotify(FilterNode.java:1460)
        at org.openide.nodes.Children.callAddNotify(Children.java:547)
        at org.openide.nodes.EntrySupport$Default.getArray(EntrySupport.java:733)
        at org.openide.nodes.EntrySupport$Default.getNodes(EntrySupport.java:163)
        at org.openide.nodes.EntrySupport$Default.getNodes(EntrySupport.java:219)
        at org.openide.nodes.EntrySupport$Default.getNodesCount(EntrySupport.java:223)
        at org.openide.nodes.Children.getNodesCount(Children.java:481)
        at org.openide.explorer.view.VisualizerNode.getChildren(VisualizerNode.java:255)
        at org.openide.explorer.view.VisualizerNode.getChildren(VisualizerNode.java:245)
        at org.openide.explorer.view.VisualizerNode.getChildCount(VisualizerNode.java:322)
        at javax.swing.tree.DefaultTreeModel.getChildCount(DefaultTreeModel.java:168)
        at javax.swing.plaf.basic.BasicTreeUI$Actions.traverse(BasicTreeUI.java:4304)
        at javax.swing.plaf.basic.BasicTreeUI$Actions.actionPerformed(BasicTreeUI.java:3961)
        at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1636)
        at javax.swing.JComponent.processKeyBinding(JComponent.java:2851)
        at javax.swing.JComponent.processKeyBindings(JComponent.java:2886)
        at javax.swing.JComponent.processKeyEvent(JComponent.java:2814)
        at java.awt.Component.processEvent(Component.java:6040)
        at java.awt.Container.processEvent(Container.java:2041)
        at java.awt.Component.dispatchEventImpl(Component.java:4630)
        at java.awt.Container.dispatchEventImpl(Container.java:2099)
        at java.awt.Component.dispatchEvent(Component.java:4460)
        at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1848)
        at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:704)
        at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:969)
        at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:841)
        at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:668)
        at java.awt.Component.dispatchEventImpl(Component.java:4502)
        at java.awt.Container.dispatchEventImpl(Container.java:2099)
        at java.awt.Window.dispatchEventImpl(Window.java:2475)
        at java.awt.Component.dispatchEvent(Component.java:4460)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:117)
        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)