java.lang.NullPointerException
   at se.softstuff.tabmaster.EditorUtils.lambda$getEditorTabs$1(EditorUtils.java:143)
   at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:176)
   at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1492)
   at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
   at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
   at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
   at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
   at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:511)
   at se.softstuff.tabmaster.EditorUtils.getEditorTabs(EditorUtils.java:143)
   at se.softstuff.tabmaster.EditorUtils.getEditorProjectTabs(EditorUtils.java:178)
   at se.softstuff.tabmaster.node.ProjNodeFactory.refresh(ProjNodeFactory.java:78)
   at se.softstuff.tabmaster.TabFinderTopComponent$2$1.done(TabFinderTopComponent.java:115)
   at javax.swing.SwingWorker$5.run(SwingWorker.java:737)
   at javax.swing.SwingWorker$DoSubmitAccumulativeRunnable.run(SwingWorker.java:834)
   at sun.swing.AccumulativeRunnable.run(AccumulativeRunnable.java:112)
   at javax.swing.SwingWorker$DoSubmitAccumulativeRunnable.actionPerformed(SwingWorker.java:844)
   at javax.swing.Timer.fireActionPerformed(Timer.java:317)
   at javax.swing.Timer$DoPostEvent.run(Timer.java:249)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:764)
   at java.awt.EventQueue.access$500(EventQueue.java:97)
   at java.awt.EventQueue$3.run(EventQueue.java:717)
   at java.awt.EventQueue$3.run(EventQueue.java:711)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:89)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:734)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:136)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:199)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)