java.lang.NullPointerException
        at ensemble.samples.web.HTMLEditorSample.<init>(HTMLEditorSample.java:108)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        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:374)
        at java.lang.Class.newInstance(Class.java:327)
        at ensemble.pages.SamplePage.createView(SamplePage.java:166)
        at ensemble.Ensemble2.goToPage(Ensemble2.java:601)
        at ensemble.Ensemble2.goToPage(Ensemble2.java:583)
        at ensemble.Ensemble2$10.changed(Ensemble2.java:317)
        at com.sun.javafx.binding.ExpressionHelper$SingleChange.fireValueChangedEvent(ExpressionHelper.java:196)
        at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:100)
        at javafx.beans.property.ReadOnlyObjectWrapper$ReadOnlyPropertyImpl.fireValueChangedEvent(ReadOnlyObjectWrapper.java:195)
        at javafx.beans.property.ReadOnlyObjectWrapper.fireValueChangedEvent(ReadOnlyObjectWrapper.java:161)
        at javafx.beans.property.ObjectPropertyBase.markInvalid(ObjectPropertyBase.java:130)
        at javafx.beans.property.ObjectPropertyBase.set(ObjectPropertyBase.java:163)
        at javafx.scene.control.SelectionModel.setSelectedItem(SelectionModel.java:101)
        at javafx.scene.control.MultipleSelectionModelBase$1.invalidated(MultipleSelectionModelBase.java:65)
        at com.sun.javafx.binding.ExpressionHelper$SingleInvalidation.fireValueChangedEvent(ExpressionHelper.java:155)
        at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:100)
        at javafx.beans.property.ReadOnlyIntegerWrapper$ReadOnlyPropertyImpl.fireValueChangedEvent(ReadOnlyIntegerWrapper.java:195)
        at javafx.beans.property.ReadOnlyIntegerWrapper.fireValueChangedEvent(ReadOnlyIntegerWrapper.java:161)
        at javafx.beans.property.IntegerPropertyBase.markInvalid(IntegerPropertyBase.java:130)
        at javafx.beans.property.IntegerPropertyBase.set(IntegerPropertyBase.java:163)
        at javafx.scene.control.SelectionModel.setSelectedIndex(SelectionModel.java:67)
        at javafx.scene.control.MultipleSelectionModelBase.select(MultipleSelectionModelBase.java:294)
        at javafx.scene.control.MultipleSelectionModelBase.clearAndSelect(MultipleSelectionModelBase.java:269)
        at com.sun.javafx.scene.control.behavior.TreeViewBehavior.selectNextRow(TreeViewBehavior.java:486)
        at com.sun.javafx.scene.control.behavior.TreeViewBehavior.callAction(TreeViewBehavior.java:129)
        at com.sun.javafx.scene.control.behavior.BehaviorBase.callActionForEvent(BehaviorBase.java:157)
        at com.sun.javafx.scene.control.behavior.TreeViewBehavior.callActionForEvent(TreeViewBehavior.java:176)
        at com.sun.javafx.scene.control.behavior.BehaviorBase$1.handle(BehaviorBase.java:121)
        at com.sun.javafx.scene.control.behavior.BehaviorBase$1.handle(BehaviorBase.java:119)
        at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:64)
        at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:217)
        at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:170)
        at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:38)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:37)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
        at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:53)
        at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:33)
        at javafx.event.Event.fireEvent(Event.java:171)
        at javafx.scene.Scene$KeyHandler.process(Scene.java:3513)
        at javafx.scene.Scene$KeyHandler.access$2300(Scene.java:3472)
        at javafx.scene.Scene.impl_processKeyEvent(Scene.java:1904)
        at javafx.scene.Scene$ScenePeerListener.keyEvent(Scene.java:2270)
        at com.sun.javafx.tk.quantum.GlassViewEventHandler$KeyEventNotification.run(GlassViewEventHandler.java:136)
        at com.sun.javafx.tk.quantum.GlassViewEventHandler$KeyEventNotification.run(GlassViewEventHandler.java:100)
        at java.security.AccessController.doPrivileged(Native Method)
        at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleKeyEvent(GlassViewEventHandler.java:163)
        at com.sun.glass.ui.View.handleKeyEvent(View.java:518)
        at com.sun.glass.ui.View.notifyKey(View.java:951)
        at com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method)
        at com.sun.glass.ui.gtk.GtkApplication$3$1.run(GtkApplication.java:82)
        at java.lang.Thread.run(Thread.java:722)