java.lang.IllegalArgumentException: Collection is empty at java.util.EnumSet.copyOf(EnumSet.java:166) at org.netbeans.modules.refactoring.java.plugins.PullUpTransformer.addAbstractMemberToTarget(PullUpTransformer.java:170) at org.netbeans.modules.refactoring.java.plugins.PullUpTransformer.addMembersToTarget(PullUpTransformer.java:122) at org.netbeans.modules.refactoring.java.plugins.PullUpTransformer.visitClass(PullUpTransformer.java:103) at org.netbeans.modules.refactoring.java.plugins.PullUpTransformer.visitClass(PullUpTransformer.java:78) at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:620) at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:67) at com.sun.source.util.TreeScanner.scan(TreeScanner.java:90) at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:98) at com.sun.source.util.TreeScanner.visitCompilationUnit(TreeScanner.java:119) at com.sun.tools.javac.tree.JCTree$JCCompilationUnit.accept(JCTree.java:490) at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:67) 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:644) at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:634) at org.netbeans.api.java.source.JavaSource$MultiTask.run(JavaSource.java:488) at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:584) 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:201) at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:198) at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176) at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360) at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:74) at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:198) at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:108) at org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:438) at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:409) at org.netbeans.api.java.source.JavaSource.runModificationTask(JavaSource.java:655) at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.processFiles(JavaRefactoringPlugin.java:273) at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.processFiles(JavaRefactoringPlugin.java:255) at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.createAndAddElements(JavaRefactoringPlugin.java:286) at org.netbeans.modules.refactoring.java.plugins.PullUpRefactoringPlugin.prepare(PullUpRefactoringPlugin.java:276) at org.netbeans.modules.refactoring.api.AbstractRefactoring.pluginsPrepare2(AbstractRefactoring.java:437) at org.netbeans.modules.refactoring.api.AbstractRefactoring.pluginsPrepare(AbstractRefactoring.java:421) at org.netbeans.modules.refactoring.api.AbstractRefactoring.prepare(AbstractRefactoring.java:232) at org.netbeans.modules.refactoring.spi.impl.ParametersPanel$Prepare.run(ParametersPanel.java:1020) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1432) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2044)