java.lang.AssertionError: visnodes.size()=4 snapshot.size()=3
        at org.openide.explorer.view.VisualizerChildren.recomputeIndexes(VisualizerChildren.java:87)
        at org.openide.explorer.view.VisualizerChildren.getIndex(VisualizerChildren.java:153)
        at org.openide.explorer.view.VisualizerNode.getIndex(VisualizerNode.java:289)
        at javax.swing.tree.DefaultTreeModel.getIndexOfChild(DefaultTreeModel.java:142)
        at javax.swing.tree.FixedHeightLayoutCache.getRowForPath(FixedHeightLayoutCache.java:217)
        at javax.swing.tree.AbstractLayoutCache.getRowsForPaths(AbstractLayoutCache.java:443)
        at javax.swing.tree.DefaultTreeSelectionModel.resetRowSelection(DefaultTreeSelectionModel.java:760)
        at javax.swing.tree.FixedHeightLayoutCache.treeNodesRemoved(FixedHeightLayoutCache.java:435)
        at javax.swing.plaf.basic.BasicTreeUI$Handler.treeNodesRemoved(BasicTreeUI.java:3815)
        at javax.swing.tree.DefaultTreeModel.fireTreeNodesRemoved(DefaultTreeModel.java:530)
        at javax.swing.tree.DefaultTreeModel.nodesWereRemoved(DefaultTreeModel.java:310)
        at org.openide.explorer.view.NodeTreeModel$Listener.removed(NodeTreeModel.java:236)
        at org.openide.explorer.view.VisualizerChildren.removed(VisualizerChildren.java:262)
        at org.openide.explorer.view.VisualizerEvent$Removed.run(VisualizerEvent.java:132)
        at org.openide.util.Mutex.readAccess(Mutex.java:362)
        at org.openide.util.Mutex$1R.run(Mutex.java:1301)
        at org.openide.util.Mutex.doWrapperAccess(Mutex.java:1318)
        at org.openide.util.Mutex.readAccess(Mutex.java:351)
        at org.openide.explorer.view.VisualizerNode$QP.run(VisualizerNode.java:707)
        at org.openide.util.Mutex.doEvent(Mutex.java:1335)
        at org.openide.util.Mutex.writeAccess(Mutex.java:452)
        at org.openide.explorer.view.VisualizerNode$QP.runSafe(VisualizerNode.java:689)
        at org.openide.explorer.view.VisualizerNode.childrenRemoved(VisualizerNode.java:371)
Caused: java.lang.reflect.InvocationTargetException
        at sun.reflect.GeneratedMethodAccessor79.invoke(GeneratedMethodAccessor79.java:0)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.openide.util.WeakListenerImpl$ProxyListener.invoke(WeakListenerImpl.java:450)
Caused: java.lang.reflect.UndeclaredThrowableException
        at $Proxy5.childrenRemoved(.java:0)
        at org.openide.nodes.Node.fireSubNodesChange(Node.java:1093)
        at org.openide.nodes.EntrySupport$Default.notifyRemove(EntrySupport.java:647)
        at org.openide.nodes.EntrySupport$Default.updateRemove(EntrySupport.java:379)
        at org.openide.nodes.EntrySupport$Default.setEntries(EntrySupport.java:333)
        at org.openide.nodes.Children$Keys$2.run(Children.java:1503)
        at org.openide.util.Mutex$1Exec.run(Mutex.java:1239)
        at org.openide.nodes.Children$ProjectManagerDeadlockDetector.execute(Children.java:1810)
        at org.openide.util.Mutex.postRequest(Mutex.java:1245)
        at org.openide.util.Mutex.postRequest(Mutex.java:1209)
        at org.openide.util.Mutex.postWriteRequest(Mutex.java:582)
        at org.openide.nodes.Children$Keys.applyKeys(Children.java:1512)
        at org.openide.nodes.Children$Keys.setKeys(Children.java:1456)
        at org.netbeans.modules.csl.navigation.ElementNode$ElementChildren.resetKeys(ElementNode.java:323)
        at org.netbeans.modules.csl.navigation.ElementNode.updateRecursively(ElementNode.java:267)
        at org.netbeans.modules.csl.navigation.ElementNode.updateRecursively(ElementNode.java:279)
        at org.netbeans.modules.csl.navigation.ClassMemberPanelUI$3.run(ClassMemberPanelUI.java:210)
        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)