java.lang.NullPointerException
	at org.openide.explorer.propertysheet.editors.ModifierEditor.addPropertyChangeListener(ModifierEditor.java:233)
	at com.sun.java.swing.plaf.gtk.SynthPanelUI.installListeners(SynthPanelUI.java:48)
	at com.sun.java.swing.plaf.gtk.SynthPanelUI.installUI(SynthPanelUI.java:36)
	at javax.swing.JComponent.setUI(JComponent.java:449)
	at javax.swing.JPanel.setUI(JPanel.java:131)
	at javax.swing.JPanel.updateUI(JPanel.java:104)
	at javax.swing.JPanel.<init>(JPanel.java:64)
	at javax.swing.JPanel.<init>(JPanel.java:87)
	at javax.swing.JPanel.<init>(JPanel.java:95)
	at org.openide.explorer.propertysheet.editors.ModifierEditor.<init>(ModifierEditor.java:62)
	at org.openide.src.nodes.MemberElementNode$2.getPropertyEditor(MemberElementNode.java:127)
	at org.openide.explorer.propertysheet.PropertyPanel.updateEditor(PropertyPanel.java:629)
	at org.openide.explorer.propertysheet.PropertyPanel.<init>(PropertyPanel.java:284)
	at org.openide.explorer.propertysheet.PropertyPanel.<init>(PropertyPanel.java:290)
	at org.openide.explorer.propertysheet.PropertySheetTab.fillProperties(PropertySheetTab.java:290)
	at org.openide.explorer.propertysheet.PropertySheetTab.createPane(PropertySheetTab.java:238)
	at org.openide.explorer.propertysheet.PropertySheetTab.ensurePaneCreated(PropertySheetTab.java:193)
	at org.openide.explorer.propertysheet.PropertySheet.setCurrentPage(PropertySheet.java:358)
	at org.openide.explorer.propertysheet.PropertySheet$1.stateChanged(PropertySheet.java:148)
	at javax.swing.JTabbedPane.fireStateChanged(JTabbedPane.java:287)
	at javax.swing.JTabbedPane$ModelListener.stateChanged(JTabbedPane.java:219)
	at javax.swing.DefaultSingleSelectionModel.fireStateChanged(DefaultSingleSelectionModel.java:116)
	at javax.swing.DefaultSingleSelectionModel.setSelectedIndex(DefaultSingleSelectionModel.java:50)
	at javax.swing.JTabbedPane.setSelectedIndexImpl(JTabbedPane.java:468)
	at javax.swing.JTabbedPane.setSelectedIndex(JTabbedPane.java:461)
	at javax.swing.JTabbedPane.insertTab(JTabbedPane.java:573)
	at javax.swing.JTabbedPane.addTab(JTabbedPane.java:607)
	at org.openide.explorer.propertysheet.PropertySheet.createPages(PropertySheet.java:572)
	at org.openide.explorer.propertysheet.PropertySheet.setCurrentNode(PropertySheet.java:619)
	at org.openide.explorer.propertysheet.PropertySheet.access$900(PropertySheet.java:53)
	at org.openide.explorer.propertysheet.PropertySheet$3.run(PropertySheet.java:271)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:178)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:454)
[catch] at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)