java.lang.NullPointerException
   at org.netbeans.modules.refactoring.java.ui.tree.ElementGripFactory$Interval.createInterval(ElementGripFactory.java:152)
   at org.netbeans.modules.refactoring.java.ui.tree.ElementGripFactory.put(ElementGripFactory.java:112)
   at org.netbeans.modules.refactoring.java.api.JavaRefactoringUtils.cacheTreePathInfo(JavaRefactoringUtils.java:378)
   at org.netbeans.modules.refactoring.java.spi.RefactoringVisitor.rewrite(RefactoringVisitor.java:153)
   at org.netbeans.modules.refactoring.java.plugins.InnerToOuterTransformer.visitMemberSelect(InnerToOuterTransformer.java:443)
   at org.netbeans.modules.refactoring.java.plugins.InnerToOuterTransformer.visitMemberSelect(InnerToOuterTransformer.java:73)
   at com.sun.tools.javac.tree.JCTree$JCFieldAccess.accept(JCTree.java:1909)
   at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:68)
   at org.netbeans.modules.refactoring.java.spi.RefactoringVisitor.scan(RefactoringVisitor.java:209)
   at org.netbeans.modules.refactoring.java.spi.RefactoringVisitor.scan(RefactoringVisitor.java:97)
   at com.sun.source.util.TreeScanner.visitMemberSelect(TreeScanner.java:346)
   at org.netbeans.modules.refactoring.java.plugins.InnerToOuterTransformer.visitMemberSelect(InnerToOuterTransformer.java:449)
   at org.netbeans.modules.refactoring.java.plugins.InnerToOuterTransformer.visitMemberSelect(InnerToOuterTransformer.java:73)
   at com.sun.tools.javac.tree.JCTree$JCFieldAccess.accept(JCTree.java:1909)
   at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:68)
   at org.netbeans.modules.refactoring.java.spi.RefactoringVisitor.scan(RefactoringVisitor.java:209)
   at org.netbeans.modules.refactoring.java.spi.RefactoringVisitor.scan(RefactoringVisitor.java:97)
   at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:81)
   at com.sun.source.util.TreeScanner.visitMethodInvocation(TreeScanner.java:270)
   at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1483)
   at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:68)
   at org.netbeans.modules.refactoring.java.spi.RefactoringVisitor.scan(RefactoringVisitor.java:209)
   at org.netbeans.modules.refactoring.java.spi.RefactoringVisitor.scan(RefactoringVisitor.java:97)
   at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:81)
   at com.sun.source.util.TreeScanner.visitLambdaExpression(TreeScanner.java:297)
   at com.sun.tools.javac.tree.JCTree$JCLambda.accept(JCTree.java:1634)
   at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:68)
   at org.netbeans.modules.refactoring.java.spi.RefactoringVisitor.scan(RefactoringVisitor.java:209)
   at org.netbeans.modules.refactoring.java.spi.RefactoringVisitor.scan(RefactoringVisitor.java:97)
   at com.sun.source.util.TreeScanner.scan(TreeScanner.java:91)
   at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:99)
   at com.sun.source.util.TreeScanner.visitMethodInvocation(TreeScanner.java:271)
   at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1483)
   at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:68)
   at org.netbeans.modules.refactoring.java.spi.RefactoringVisitor.scan(RefactoringVisitor.java:209)
   at org.netbeans.modules.refactoring.java.spi.RefactoringVisitor.scan(RefactoringVisitor.java:97)
   at com.sun.source.util.TreeScanner.visitReturn(TreeScanner.java:255)
   at com.sun.tools.javac.tree.JCTree$JCReturn.accept(JCTree.java:1396)
   at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:68)
   at org.netbeans.modules.refactoring.java.spi.RefactoringVisitor.scan(RefactoringVisitor.java:209)
   at org.netbeans.modules.refactoring.java.spi.RefactoringVisitor.scan(RefactoringVisitor.java:97)
   at com.sun.source.util.TreeScanner.scan(TreeScanner.java:91)
   at com.sun.source.util.TreeScanner.visitBlock(TreeScanner.java:162)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:924)
   at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:68)
   at org.netbeans.modules.refactoring.java.spi.RefactoringVisitor.scan(RefactoringVisitor.java:209)
   at org.netbeans.modules.refactoring.java.spi.RefactoringVisitor.scan(RefactoringVisitor.java:97)
   at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:81)
   at com.sun.source.util.TreeScanner.visitMethod(TreeScanner.java:144)
   at org.netbeans.modules.refactoring.java.plugins.InnerToOuterTransformer.visitMethod(InnerToOuterTransformer.java:249)
   at org.netbeans.modules.refactoring.java.plugins.InnerToOuterTransformer.visitMethod(InnerToOuterTransformer.java:73)
   at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:806)
   at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:68)
   at org.netbeans.modules.refactoring.java.spi.RefactoringVisitor.scan(RefactoringVisitor.java:209)
   at org.netbeans.modules.refactoring.java.spi.RefactoringVisitor.scan(RefactoringVisitor.java:97)
   at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:81)
   at com.sun.source.util.TreeScanner.scan(TreeScanner.java:91)
   at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:99)
   at com.sun.source.util.TreeScanner.visitClass(TreeScanner.java:133)
   at org.netbeans.modules.refactoring.java.plugins.InnerToOuterTransformer.visitClass(InnerToOuterTransformer.java:354)
   at org.netbeans.modules.refactoring.java.plugins.InnerToOuterTransformer.visitClass(InnerToOuterTransformer.java:73)
   at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:725)
   at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:68)
   at org.netbeans.modules.refactoring.java.spi.RefactoringVisitor.scan(RefactoringVisitor.java:209)
   at org.netbeans.modules.refactoring.java.spi.RefactoringVisitor.scan(RefactoringVisitor.java:97)
   at com.sun.source.util.TreeScanner.scan(TreeScanner.java:91)
   at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:99)
   at com.sun.source.util.TreeScanner.visitCompilationUnit(TreeScanner.java:120)
   at org.netbeans.modules.refactoring.java.plugins.InnerToOuterTransformer.visitCompilationUnit(InnerToOuterTransformer.java:361)
   at org.netbeans.modules.refactoring.java.plugins.InnerToOuterTransformer.visitCompilationUnit(InnerToOuterTransformer.java:73)
   at com.sun.tools.javac.tree.JCTree$JCCompilationUnit.accept(JCTree.java:551)
   at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:68)
   at org.netbeans.modules.refactoring.java.spi.RefactoringVisitor.scan(RefactoringVisitor.java:209)
   at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin$TransformTask.run(JavaRefactoringPlugin.java:403)
   at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin$TransformTask.run(JavaRefactoringPlugin.java:368)
   at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:649)
   at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:639)
   at org.netbeans.api.java.source.JavaSource$MultiTask.run(JavaSource.java:493)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:598)
   at org.netbeans.modules.parsing.api.ParserManager$MultiUserTaskAction.run(ParserManager.java:191)
   at org.netbeans.modules.parsing.api.ParserManager$MultiUserTaskAction.run(ParserManager.java:163)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:206)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:203)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:74)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:203)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:108)
   at org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:443)
   at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:414)
   at org.netbeans.api.java.source.JavaSource.runModificationTask(JavaSource.java:660)
   at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.processFiles(JavaRefactoringPlugin.java:273)
   at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.processFiles(JavaRefactoringPlugin.java:255)
   at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.createAndAddElements(JavaRefactoringPlugin.java:286)
   at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.createAndAddElements(JavaRefactoringPlugin.java:302)
   at org.netbeans.modules.refactoring.java.plugins.InnerToOuterRefactoringPlugin.prepare(InnerToOuterRefactoringPlugin.java:243)
   at org.netbeans.modules.refactoring.api.AbstractRefactoring.pluginsPrepare2(AbstractRefactoring.java:437)
   at org.netbeans.modules.refactoring.api.AbstractRefactoring.pluginsPrepare(AbstractRefactoring.java:421)
   at org.netbeans.modules.refactoring.api.AbstractRefactoring.prepare(AbstractRefactoring.java:232)
   at org.netbeans.modules.refactoring.spi.impl.ParametersPanel$Prepare.run(ParametersPanel.java:1040)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)