public static void performInplaceIntroduceVariable(IntroduceOperation operation, PsiElement statement) {
    if (statement instanceof PyAssignmentStatement) {
      PyTargetExpression target = (PyTargetExpression) ((PyAssignmentStatement)statement).getTargets() [0];
      final List<PsiElement> occurrences = operation.getOccurrences();
      final PsiElement occurrence = findOccurrenceUnderCaret(occurrences, operation.getEditor());
      PsiElement elementForCaret = occurrence != null ? occurrence : target;
      operation.getEditor().getCaretModel().moveToOffset(elementForCaret.getTextRange().getStartOffset());
      final InplaceVariableIntroducer<PsiElement> introducer =
        new PyInplaceVariableIntroducer(target, operation, occurrences);
      introducer.performInplaceRefactoring(new LinkedHashSet<>(operation.getSuggestedNames()));
    }
  }
public static void performInplaceIntroduceVariable(IntroduceOperation operation, PsiElement statement)