java.lang.NullPointerException
   at org.netbeans.modules.groovy.editor.api.Methods.getMethodParams(Methods.java:213)
   at org.netbeans.modules.groovy.editor.api.Methods.hasSameParameters(Methods.java:189)
   at org.netbeans.modules.groovy.refactoring.findusages.impl.FindMethodUsagesVisitor.visitConstructorOrMethod(FindMethodUsagesVisitor.java:113)
   at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitMethod(ClassCodeVisitorSupport.java:123)
   at org.codehaus.groovy.ast.ClassNode.visitContents(ClassNode.java:1056)
   at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitClass(ClassCodeVisitorSupport.java:50)
   at org.netbeans.modules.groovy.refactoring.findusages.impl.AbstractFindUsagesVisitor.findUsages(AbstractFindUsagesVisitor.java:67)
   at org.netbeans.modules.groovy.refactoring.findusages.impl.AbstractFindUsages$AddFindUsagesElementsTask.run(AbstractFindUsages.java:134)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:593)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:155)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:139)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:206)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:203)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:74)
Caused: org.netbeans.modules.parsing.spi.ParseException
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:211)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:106)
   at org.netbeans.modules.groovy.refactoring.findusages.impl.AbstractFindUsages.findUsages(AbstractFindUsages.java:95)
   at org.netbeans.modules.groovy.refactoring.findusages.FindUsagesPlugin.collectUsages(FindUsagesPlugin.java:116)
   at org.netbeans.modules.groovy.refactoring.findusages.FindUsagesPlugin.prepare(FindUsagesPlugin.java:89)
   at org.netbeans.modules.refactoring.api.AbstractRefactoring.pluginsPrepare2(AbstractRefactoring.java:437)
   at org.netbeans.modules.refactoring.api.AbstractRefactoring.pluginsPrepare(AbstractRefactoring.java:421)
   at org.netbeans.modules.refactoring.api.AbstractRefactoring.prepare(AbstractRefactoring.java:232)
   at org.netbeans.modules.refactoring.spi.impl.ParametersPanel$Prepare$2.run(ParametersPanel.java:1017)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1432)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2042)