void (@NotNull final Project project, PsiElement @NotNull [] elements, DataContext dataContext) { if (elements.length != 1) return; PsiClass subClass = (PsiClass)elements[0]; List<PsiClass> basesList = RefactoringHierarchyUtil.createBasesList(subClass, true, true); if (basesList.isEmpty()) { String message = RefactoringBundle.getCannotRefactorMessage(JavaRefactoringBundle.message("interface.does.not.have.base.interfaces", subClass.getQualifiedName())); Editor editor = CommonDataKeys.EDITOR.getData(dataContext); CommonRefactoringUtil.showErrorHint(project, editor, message, getRefactoringName(), HelpID.TURN_REFS_TO_SUPER); return; } new TurnRefsToSuperDialog(project, subClass, basesList).show(); }