java.lang.NullPointerException
   at org.netbeans.ShapeSample.ShapeChildren.initCollection(ShapeChildren.java:158)
   at org.netbeans.ShapeSample.ShapeChildren.initCollection(ShapeChildren.java:32)
   at org.openide.nodes.Children$Array.getCollection(Children.java:806)
   at org.openide.nodes.Children$Array$AE.nodes(Children.java:857)
   at org.openide.nodes.ChildrenArray.nodesFor(ChildrenArray.java:149)
   at org.openide.nodes.EntrySupportDefault$Info.nodes(EntrySupportDefault.java:787)
   at org.openide.nodes.EntrySupportDefault.justComputeNodes(EntrySupportDefault.java:188)
   at org.openide.nodes.ChildrenArray.nodes(ChildrenArray.java:88)
   at org.openide.nodes.EntrySupportDefault.getNodes(EntrySupportDefault.java:123)
   at org.openide.nodes.EntrySupportDefault.getNodes(EntrySupportDefault.java:165)
   at org.openide.nodes.Children.getNodes(Children.java:469)
   at org.openide.nodes.Children.findChild(Children.java:414)
   at org.openide.nodes.EntrySupportDefault.getNodes(EntrySupportDefault.java:159)
   at org.openide.nodes.Children.getNodes(Children.java:501)
   at org.openide.nodes.FilterNode$Children$DefaultSupport.callGetNodes(FilterNode.java:1650)
   at org.openide.nodes.FilterNode$Children.getNodes(FilterNode.java:1606)
   at org.netbeans.modules.palette.DefaultCategory.getItems(DefaultCategory.java:119)
   at org.netbeans.modules.palette.DefaultSettings.load(DefaultSettings.java:297)
   at org.netbeans.modules.palette.DefaultSettings.<init>(DefaultSettings.java:110)
   at org.netbeans.spi.palette.PaletteFactory.createPalette(PaletteFactory.java:165)
   at org.netbeans.ShapeSample.PaletteSupport.createPalette(PaletteSupport.java:46)
   at org.netbeans.ShapeSample.ShapeTopComponent.<init>(ShapeTopComponent.java:80)
   at sun.reflect.NativeConstructorAccessorImpl.newInstance0(NativeConstructorAccessorImpl.java:0)
   at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
   at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
   at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
   at java.lang.Class.newInstance0(Class.java:372)
   at java.lang.Class.newInstance(Class.java:325)
   at org.netbeans.modules.settings.convertors.XMLPropertiesConvertor.defaultInstanceCreate(XMLPropertiesConvertor.java:227)
   at org.netbeans.modules.settings.convertors.XMLPropertiesConvertor.read(XMLPropertiesConvertor.java:98)
   at org.netbeans.modules.settings.InstanceProvider$InstanceCookieImpl.instanceCreate(InstanceProvider.java:310)
   at org.netbeans.core.windows.persistence.PersistenceManager.getTopComponentPersistentForID(PersistenceManager.java:571)
   at org.netbeans.core.windows.persistence.PersistenceManager.getTopComponentForID(PersistenceManager.java:681)
   at org.netbeans.core.windows.PersistenceHandler.getTopComponentForID(PersistenceHandler.java:489)
   at org.netbeans.core.windows.PersistenceHandler.load(PersistenceHandler.java:156)
   at org.netbeans.core.windows.WindowSystemImpl.load(WindowSystemImpl.java:81)
   at org.netbeans.core.GuiRunLevel$InitWinSys.run(GuiRunLevel.java:234)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:705)
   at java.awt.EventQueue.access$000(EventQueue.java:101)
   at java.awt.EventQueue$3.run(EventQueue.java:666)
   at java.awt.EventQueue$3.run(EventQueue.java:664)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:675)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:158)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:211)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)