java.lang.AssertionError: visnodes.size()=20 snapshot.size()=10
   at org.openide.explorer.view.VisualizerChildren.recomputeIndexes(VisualizerChildren.java:98)
   at org.openide.explorer.view.VisualizerChildren.added(VisualizerChildren.java:242)
   at org.openide.explorer.view.VisualizerEvent$Added.run(VisualizerEvent.java:110)
   at org.openide.util.Mutex.readAccess(Mutex.java:367)
   at org.openide.util.Mutex$1R.run(Mutex.java:1309)
   at org.openide.nodes.Children$ProjectManagerDeadlockDetector.execute(Children.java:1921)
   at org.openide.util.Mutex.doWrapperAccess(Mutex.java:1328)
   at org.openide.util.Mutex.readAccess(Mutex.java:356)
   at org.openide.explorer.view.VisualizerNode$QP.processQueue(VisualizerNode.java:685)
   at org.openide.explorer.view.VisualizerNode$QP.access$000(VisualizerNode.java:624)
   at org.openide.explorer.view.VisualizerNode$QP$ProcessQueue.run(VisualizerNode.java:706)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:721)
   at java.awt.EventQueue.access$200(EventQueue.java:103)
   at java.awt.EventQueue$3.run(EventQueue.java:682)
   at java.awt.EventQueue$3.run(EventQueue.java:680)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:691)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)