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BoxLayout can't be shared
java.awt.AWTError: BoxLayout can't be shared	at javax.swing.BoxLayout.checkContainer(BoxLayout.java:359)	at javax.swing.BoxLayout.invalidateLayout(BoxLayout.java:152)	at java.awt.Container.invalidate(Container.java:701)	at java.awt.Component.addNotify(Component.java:4036)	at java.awt.Container.addNotify(Container.java:1572)	at javax.swing.JComponent.addNotify(JComponent.java:3500)	at java.awt.Container.addNotify(Container.java:1579)	at javax.swing.JComponent.addNotify(JComponent.java:3500)	at java.awt.Container.addNotify(Container.java:1579)	at javax.swing.JComponent.addNotify(JComponent.java:3500)	at java.awt.Container.addNotify(Container.java:1579)	at javax.swing.JComponent.addNotify(JComponent.java:3500)	at java.awt.Container.addNotify(Container.java:1579)	at javax.swing.JComponent.addNotify(JComponent.java:3500)	at java.awt.Container.addNotify(Container.java:1579)	at javax.swing.JComponent.addNotify(JComponent.java:3500)	at javax.swing.JRootPane.addNotify(JRootPane.java:483)	at java.awt.Container.addNotify(Container.java:1579)	at java.awt.Window.addNotify(Window.java:351)	at java.awt.Frame.addNotify(Frame.java:361)	at java.awt.Window.pack(Window.java:369)	at undefined.LightbarBuilder.main(lightbarBuilder.java:284)