java.lang.NullPointerException
   at utils.Model.FilterListModel.getSize(FilterListModel.java:118)
   at javax.swing.JList.getPreferredScrollableViewportSize(JList.java:2448)
   at javax.swing.ViewportLayout.preferredLayoutSize(ViewportLayout.java:92)
   at java.awt.Container.preferredSize(Container.java:1788)
   at java.awt.Container.getPreferredSize(Container.java:1773)
   at javax.swing.JComponent.getPreferredSize(JComponent.java:1662)
   at javax.swing.ScrollPaneLayout.preferredLayoutSize(ScrollPaneLayout.java:492)
   at java.awt.Container.preferredSize(Container.java:1788)
   at java.awt.Container.getPreferredSize(Container.java:1773)
   at javax.swing.JComponent.getPreferredSize(JComponent.java:1662)
   at javax.swing.GroupLayout$ComponentSpring.calculateNonlinkedPreferredSize(GroupLayout.java:3019)
   at javax.swing.GroupLayout$ComponentSpring.calculatePreferredSize(GroupLayout.java:2980)
   at javax.swing.GroupLayout$Spring.getPreferredSize(GroupLayout.java:1346)
   at javax.swing.GroupLayout$Group.getSpringSize(GroupLayout.java:1638)
   at javax.swing.GroupLayout$Group.calculateSize(GroupLayout.java:1624)
   at javax.swing.GroupLayout$Group.calculatePreferredSize(GroupLayout.java:1602)
   at javax.swing.GroupLayout$Spring.getPreferredSize(GroupLayout.java:1346)
   at javax.swing.GroupLayout$Group.getSpringSize(GroupLayout.java:1638)
   at javax.swing.GroupLayout$Group.calculateSize(GroupLayout.java:1622)
   at javax.swing.GroupLayout$Group.calculatePreferredSize(GroupLayout.java:1602)
   at javax.swing.GroupLayout$Spring.getPreferredSize(GroupLayout.java:1346)
   at javax.swing.GroupLayout$SequentialGroup.setValidSize(GroupLayout.java:2017)
   at javax.swing.GroupLayout$Group.setSize(GroupLayout.java:1587)
   at javax.swing.GroupLayout.calculateAutopadding(GroupLayout.java:1079)
   at javax.swing.GroupLayout.prepare(GroupLayout.java:1058)
   at javax.swing.GroupLayout.minimumLayoutSize(GroupLayout.java:896)
   at java.awt.Container.minimumSize(Container.java:1840)
   at java.awt.Container.getMinimumSize(Container.java:1825)
   at javax.swing.JComponent.getMinimumSize(JComponent.java:1744)
   at java.awt.BorderLayout.minimumLayoutSize(BorderLayout.java:663)
   at java.awt.Container.minimumSize(Container.java:1840)
   at java.awt.Container.getMinimumSize(Container.java:1825)
   at javax.swing.JComponent.getMinimumSize(JComponent.java:1744)
   at org.netbeans.modules.form.FormDesigner.checkDesignerSize(FormDesigner.java:971)
   at org.netbeans.modules.form.FormDesigner.access$2000(FormDesigner.java:103)
   at org.netbeans.modules.form.FormDesigner$FormListener.run(FormDesigner.java:2693)
   at org.netbeans.modules.form.FormLAF$3.run(FormLAF.java:333)
   at org.netbeans.modules.openide.util.NbMutexEventProvider$Event.doEventAccess(NbMutexEventProvider.java:138)
   at org.netbeans.modules.openide.util.NbMutexEventProvider$Event.readAccess(NbMutexEventProvider.java:98)
   at org.netbeans.modules.openide.util.LazyMutexImplementation.readAccess(LazyMutexImplementation.java:94)
   at org.openide.util.Mutex.readAccess(Mutex.java:218)
   at org.netbeans.modules.form.FormLAF.executeWithLookAndFeel(FormLAF.java:316)
   at org.netbeans.modules.form.FormDesigner$FormListener.processEvents(FormDesigner.java:2538)
   at org.netbeans.modules.form.FormDesigner$FormListener.formChanged(FormDesigner.java:2504)
   at org.netbeans.modules.form.FormModel.fireEvents(FormModel.java:1327)
   at org.netbeans.modules.form.FormModel.fireEventBatch(FormModel.java:1300)
   at org.netbeans.modules.form.FormModel.firePendingEvents(FormModel.java:1263)
   at org.netbeans.modules.form.FormModel.access$000(FormModel.java:68)
   at org.netbeans.modules.form.FormModel$2.run(FormModel.java:1240)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
   at java.awt.EventQueue.access$200(EventQueue.java:103)
   at java.awt.EventQueue$3.run(EventQueue.java:694)
   at java.awt.EventQueue$3.run(EventQueue.java:692)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:703)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)