java.lang.AssertionError: visnodes.size()=3 snapshot.size()=2
        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$FHTreeStateNode.createChildFor(FixedHeightLayoutCache.java:953)
        at javax.swing.tree.FixedHeightLayoutCache.getNodeForPath(FixedHeightLayoutCache.java:701)
        at javax.swing.tree.FixedHeightLayoutCache.ensurePathIsExpanded(FixedHeightLayoutCache.java:639)
        at javax.swing.tree.FixedHeightLayoutCache.setExpandedState(FixedHeightLayoutCache.java:282)
        at javax.swing.plaf.basic.BasicTreeUI.updateExpandedDescendants(BasicTreeUI.java:1648)
        at javax.swing.plaf.basic.BasicTreeUI$Handler.treeExpanded(BasicTreeUI.java:3721)
        at javax.swing.JTree.fireTreeExpanded(JTree.java:2656)
        at javax.swing.JTree.setExpandedState(JTree.java:3427)
        at javax.swing.JTree.expandPath(JTree.java:2163)
        at org.openide.explorer.view.TreeView$2.run(TreeView.java:571)
        at org.openide.util.Mutex.readAccess(Mutex.java:362)
        at org.openide.util.Mutex$1R.run(Mutex.java:1301)
        at org.openide.nodes.Children$ProjectManagerDeadlockDetector.execute(Children.java:1810)
        at org.openide.util.Mutex.doWrapperAccess(Mutex.java:1320)
        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.runSafe(VisualizerNode.java:627)
        at org.openide.explorer.view.TreeView.expandNode(TreeView.java:568)
        at org.netbeans.modules.csl.navigation.ClassMemberPanelUI.expandNode(ClassMemberPanelUI.java:267)
        at org.netbeans.modules.csl.navigation.ElementNode.updateRecursively(ElementNode.java:277)
        at org.netbeans.modules.csl.navigation.ElementNode.updateRecursively(ElementNode.java:279)
        at org.netbeans.modules.csl.navigation.ElementNode.updateRecursively(ElementNode.java:279)
        at org.netbeans.modules.csl.navigation.ElementNode.updateRecursively(ElementNode.java:279)
        at org.netbeans.modules.csl.navigation.ElementNode.updateRecursively(ElementNode.java:279)
        at org.netbeans.modules.csl.navigation.ElementNode.updateRecursively(ElementNode.java:279)
        at org.netbeans.modules.csl.navigation.ElementNode.updateRecursively(ElementNode.java:279)
        at org.netbeans.modules.csl.navigation.ElementNode.updateRecursively(ElementNode.java:279)
        at org.netbeans.modules.csl.navigation.ElementNode.updateRecursively(ElementNode.java:279)
        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)