java.lang.IllegalStateException: FoldHierarchyChange already committed.
   at org.netbeans.modules.editor.fold.FoldHierarchyTransactionImpl.checkNotCommitted(FoldHierarchyTransactionImpl.java:1271)
   at org.netbeans.modules.editor.fold.FoldHierarchyTransactionImpl.commit(FoldHierarchyTransactionImpl.java:208)
   at org.netbeans.spi.editor.fold.FoldHierarchyTransaction.commit(FoldHierarchyTransaction.java:91)
   at com.tsi.netbeans.modules.languages.velocity.editor.fold.VTLFoldAnalyser.commitTransaction(VTLFoldAnalyser.java:168)
   at com.tsi.netbeans.modules.languages.velocity.parser.VTLParser.parse(VTLParser.java:76)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callParse(TaskProcessor.java:605)
   at org.netbeans.modules.parsing.impl.SourceCache.getResult(SourceCache.java:245)
   at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:727)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
   at java.util.concurrent.FutureTask.run(FutureTask.java:262)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)