@Override
 protected void moveOffsetAfter(boolean success) {
   if (success && (myPanel != null && myPanel.getInitPlace() != InitPlace.SAME_METHOD)
       || myOperation.getInplaceInitPlace() != InitPlace.SAME_METHOD) {
     final AccessToken accessToken =
         ApplicationManager.getApplication().acquireWriteActionLock(getClass());
     try {
       final PyAssignmentStatement initializer =
           PsiTreeUtil.getParentOfType(myTarget, PyAssignmentStatement.class);
       assert initializer != null;
       final Function<String, PyStatement> callback =
           FunctionUtil.<String, PyStatement>constant(initializer);
       final PyClass pyClass = PyUtil.getContainingClassOrSelf(initializer);
       InitPlace initPlace =
           myPanel != null ? myPanel.getInitPlace() : myOperation.getInplaceInitPlace();
       if (initPlace == InitPlace.CONSTRUCTOR) {
         AddFieldQuickFix.addFieldToInit(myProject, pyClass, "", callback);
       } else if (initPlace == InitPlace.SET_UP) {
         addFieldToSetUp(pyClass, callback);
       }
       if (myOperation.getOccurrences().size() > 0) {
         initializer.delete();
       } else {
         final PyExpression copy =
             PyElementGenerator.getInstance(myProject)
                 .createExpressionFromText(
                     LanguageLevel.forElement(myTarget), myTarget.getText());
         initializer.replace(copy);
       }
       initializer.delete();
     } finally {
       accessToken.finish();
     }
   }
 }
 @Nullable
 private static PsiElement addFieldToSetUp(
     PyClass clazz, final Function<String, PyStatement> callback) {
   final PyFunction init =
       clazz.findMethodByName(PythonUnitTestUtil.TESTCASE_SETUP_NAME, false, null);
   if (init != null) {
     return AddFieldQuickFix.appendToMethod(init, callback);
   }
   final PyFunctionBuilder builder =
       new PyFunctionBuilder(PythonUnitTestUtil.TESTCASE_SETUP_NAME, clazz);
   builder.parameter(PyNames.CANONICAL_SELF);
   PyFunction setUp = builder.buildFunction(clazz.getProject(), LanguageLevel.getDefault());
   final PyStatementList statements = clazz.getStatementList();
   final PsiElement anchor = statements.getFirstChild();
   setUp = (PyFunction) statements.addBefore(setUp, anchor);
   return AddFieldQuickFix.appendToMethod(setUp, callback);
 }
 @Nullable
 @Override
 protected PsiElement addDeclaration(
     @NotNull PsiElement expression,
     @NotNull PsiElement declaration,
     @NotNull IntroduceOperation operation) {
   final PsiElement expr = expression instanceof PyClass ? expression : expression.getParent();
   PsiElement anchor = PyUtil.getContainingClassOrSelf(expr);
   assert anchor instanceof PyClass;
   final PyClass clazz = (PyClass) anchor;
   final Project project = anchor.getProject();
   if (operation.getInitPlace() == InitPlace.CONSTRUCTOR && !inConstructor(expression)) {
     return AddFieldQuickFix.addFieldToInit(
         project, clazz, "", new AddFieldDeclaration(declaration));
   } else if (operation.getInitPlace() == InitPlace.SET_UP) {
     return addFieldToSetUp(clazz, new AddFieldDeclaration(declaration));
   }
   return PyIntroduceVariableHandler.doIntroduceVariable(
       expression, declaration, operation.getOccurrences(), operation.isReplaceAll());
 }