java.lang.NoClassDefFoundError: org/openide/util/ImageUtilities$CompositeImageKey
   at org.openide.util.ImageUtilities.mergeImages(ImageUtilities.java:185)
   at org.netbeans.spi.java.project.support.ui.PackageRootNode.computeIcon(PackageRootNode.java:368)
   at org.netbeans.spi.java.project.support.ui.PackageRootNode.getIcon(PackageRootNode.java:137)
   at org.openide.nodes.FilterNode.getIcon(FilterNode.java:569)
   at org.openide.nodes.FilterNode.getIcon(FilterNode.java:569)
   at org.openide.explorer.view.VisualizerNode.getIcon(VisualizerNode.java:559)
   at org.openide.explorer.view.NodeRenderer.configureFrom(NodeRenderer.java:215)
   at org.openide.explorer.view.NodeRenderer.getTreeCellRendererComponent(NodeRenderer.java:147)
   at javax.swing.plaf.basic.BasicTreeUI$NodeDimensionsHandler.getNodeDimensions(BasicTreeUI.java:2786)
   at javax.swing.tree.AbstractLayoutCache.getNodeDimensions(AbstractLayoutCache.java:492)
   at javax.swing.tree.FixedHeightLayoutCache.getBounds(FixedHeightLayoutCache.java:552)
   at javax.swing.tree.FixedHeightLayoutCache.getBounds(FixedHeightLayoutCache.java:198)
   at javax.swing.tree.AbstractLayoutCache.getPreferredWidth(AbstractLayoutCache.java:245)
   at javax.swing.plaf.basic.BasicTreeUI.updateCachedPreferredSize(BasicTreeUI.java:1882)
   at javax.swing.plaf.basic.BasicTreeUI.getPreferredSize(BasicTreeUI.java:1985)
   at javax.swing.plaf.basic.BasicTreeUI.getPreferredSize(BasicTreeUI.java:1973)
   at javax.swing.JComponent.getPreferredSize(JComponent.java:1660)
   at javax.swing.ScrollPaneLayout.layoutContainer(ScrollPaneLayout.java:790)
   at org.openide.explorer.view.TreeView$ExplorerScrollPaneLayout.layoutContainer(TreeView.java:1724)
   at java.awt.Container.layout(Container.java:1503)
   at java.awt.Container.doLayout(Container.java:1492)
   at java.awt.Container.validateTree(Container.java:1688)
   at java.awt.Container.validate(Container.java:1623)
   at org.openide.explorer.view.TreeView.access$101(TreeView.java:151)
   at org.openide.explorer.view.TreeView$3.run(TreeView.java:670)
   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:1920)
   at org.openide.util.Mutex.doWrapperAccess(Mutex.java:1328)
   at org.openide.util.Mutex.readAccess(Mutex.java:356)
   at org.openide.explorer.view.TreeView.validate(TreeView.java:667)
   at javax.swing.RepaintManager.validateInvalidComponents(RepaintManager.java:653)
   at javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1620)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:701)
   at java.awt.EventQueue.access$000(EventQueue.java:102)
   at java.awt.EventQueue$3.run(EventQueue.java:662)
   at java.awt.EventQueue$3.run(EventQueue.java:660)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:671)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:158)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:244)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:163)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:147)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:139)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:97)