javax.jmi.reflect.CompositionViolationException
        at org.netbeans.modules.javacore.jmiimpl.javamodel.DeferredObject.setComposite(DeferredObject.java:99)
        at org.netbeans.modules.javacore.jmiimpl.javamodel.MetadataElement.changeChild(MetadataElement.java:426)
        at org.netbeans.modules.javacore.jmiimpl.javamodel.MethodInvocationImpl.setData(MethodInvocationImpl.java:152)
        at org.netbeans.modules.javacore.jmiimpl.javamodel.MethodInvocationClassImpl.create(MethodInvocationClassImpl.java:46)
        at org.netbeans.modules.javacore.jmiimpl.javamodel.MethodInvocationClassImpl.createMethodInvocation(MethodInvocationClassImpl.java:51)
        at org.netbeans.jmi.javamodel.MethodInvocationClass$Impl.createMethodInvocation(Unknown Source)
        at org.netbeans.modules.refactoring.EncapsulateFieldElement.createSetGet(EncapsulateFieldElement.java:94)
        at org.netbeans.modules.refactoring.EncapsulateFieldElement.performChange(EncapsulateFieldElement.java:130)
        at org.netbeans.modules.refactoring.RefactoringSupportImpl.doRefactoring(RefactoringSupportImpl.java:63)
        at org.netbeans.modules.refactoring.ui.RefactoringPanel$1.run(RefactoringPanel.java:296)
        at org.openide.util.Task.run(Task.java:136)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:330)
[catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:686)