If you do this:

        InspectorPanelController ipc = new InspectorPanelController(new EditorController());
        ipc.setExpandedSection(InspectorPanelController.SectionId.PROPERTIES);

you get the following exception:
Caused by: java.lang.NullPointerException
at com.oracle.javafx.scenebuilder.kit.editor.panel.inspector.InspectorPanelController.setExpandedSection(InspectorPanelController.java:374)
at javafxapplication4.JavaFXApplication4.start(JavaFXApplication4.java:50)
at com.sun.javafx.application.LauncherImpl$8.run(LauncherImpl.java:837)
at com.sun.javafx.application.PlatformImpl$7.run(PlatformImpl.java:335)
at com.sun.javafx.application.PlatformImpl$6$1.run(PlatformImpl.java:301)
at com.sun.javafx.application.PlatformImpl$6$1.run(PlatformImpl.java:298)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl$6.run(PlatformImpl.java:298)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)