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Parameter specified as non-null is null: method tornadofx.NodesKt.replaceWith, parameter $receiver
java.lang.IllegalArgumentException: Parameter specified as non-null is null: method tornadofx.NodesKt.replaceWith, parameter $receiver	at tornadofx.NodesKt.replaceWith(Nodes.kt)	at tornadofx.NodesKt.replaceWith$default(Nodes.kt:917)	at tornadofx.Slideshow.goto(Slideshow.kt:85)	at tornadofx.Slideshow.next(Slideshow.kt:42)	at tornadofx.Slideshow$hookNavigationShortcuts$1$1.handle(Slideshow.kt:61)	at tornadofx.Slideshow$hookNavigationShortcuts$1$1.handle(Slideshow.kt:16)	at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218)	at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)	at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)	at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)	at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)	at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)	at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)	at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)	at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)	at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)	at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)	at javafx.event.Event.fireEvent(Event.java:198)	at javafx.scene.Scene$KeyHandler.process(Scene.java:3964)	at javafx.scene.Scene$KeyHandler.access$1800(Scene.java:3910)	at javafx.scene.Scene.impl_processKeyEvent(Scene.java:2040)	at javafx.scene.Scene$ScenePeerListener.keyEvent(Scene.java:2501)	at com.sun.javafx.tk.quantum.GlassViewEventHandler$KeyEventNotification.run(GlassViewEventHandler.java:216)	at com.sun.javafx.tk.quantum.GlassViewEventHandler$KeyEventNotification.run(GlassViewEventHandler.java:148)	at java.security.AccessController.doPrivileged(Native Method)	at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleKeyEvent$353(GlassViewEventHandler.java:247)	at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)	at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleKeyEvent(GlassViewEventHandler.java:246)	at com.sun.glass.ui.View.handleKeyEvent(View.java:546)	at com.sun.glass.ui.View.notifyKey(View.java:966)	at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)	at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)	at java.lang.Thread.run(Thread.java:745)