java.lang.ClassCastException: org.openide.text.UndoRedoManager cannot be cast to org.netbeans.modules.websvc.rest.wadl.design.undo.QuietUndoManager
   at org.netbeans.modules.websvc.rest.wadl.design.loader.WadlEditorSupport.getUndoManager(WadlEditorSupport.java:255)
   at org.netbeans.modules.websvc.rest.wadl.design.loader.WadlEditorSupport$3.taskFinished(WadlEditorSupport.java:266)
   at org.openide.util.Task.addTaskListener(Task.java:266)
   at org.netbeans.modules.websvc.rest.wadl.design.loader.WadlEditorSupport.prepareDocument(WadlEditorSupport.java:264)
   at org.openide.text.CloneableEditorSupport.createCloneableTopComponent(CloneableEditorSupport.java:1364)
   at org.openide.windows.CloneableOpenSupport.openCloneableTopComponent(CloneableOpenSupport.java:200)
   at org.openide.windows.CloneableOpenSupport$1.run(CloneableOpenSupport.java:101)
   at org.openide.util.Mutex.doEvent(Mutex.java:1341)
   at org.openide.util.Mutex.writeAccess(Mutex.java:455)
   at org.openide.windows.CloneableOpenSupport.open(CloneableOpenSupport.java:98)
   at org.openide.text.CloneableEditorSupport.open(CloneableEditorSupport.java:512)
   at org.netbeans.modules.websvc.rest.wadl.design.actions.WadlViewOpenAction.performAction(WadlViewOpenAction.java:49)
   at org.openide.util.actions.NodeAction$DelegateAction$1.run(NodeAction.java:586)
   at org.openide.util.actions.ActionInvoker$1.run(ActionInvoker.java:95)
   at org.openide.util.actions.ActionInvoker.doPerformAction(ActionInvoker.java:116)
   at org.openide.util.actions.ActionInvoker.invokeAction(ActionInvoker.java:99)
   at org.openide.util.actions.NodeAction$DelegateAction.actionPerformed(NodeAction.java:583)
   at org.openide.explorer.view.TreeView$PopupSupport.mouseClicked(TreeView.java:1624)
   at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:270)
   at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:269)
   at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:269)
   at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:269)
   at java.awt.Component.processMouseEvent(Component.java:6507)
   at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
   at java.awt.Component.processEvent(Component.java:6269)
   at java.awt.Container.processEvent(Container.java:2229)
   at java.awt.Component.dispatchEventImpl(Component.java:4860)
   at java.awt.Container.dispatchEventImpl(Container.java:2287)
   at java.awt.Component.dispatchEvent(Component.java:4686)
   at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4832)
   at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4501)
   at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4422)
   at java.awt.Container.dispatchEventImpl(Container.java:2273)
   at java.awt.Window.dispatchEventImpl(Window.java:2713)
   at java.awt.Component.dispatchEvent(Component.java:4686)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:707)
   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.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
   at java.awt.EventQueue$4.run(EventQueue.java:680)
   at java.awt.EventQueue$4.run(EventQueue.java:678)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:677)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:162)
   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)