@Override
  public PyStringLiteralExpression createStringLiteralAlreadyEscaped(String str) {
    final PsiFile dummyFile = createDummyFile(LanguageLevel.getDefault(), "a=(" + str + ")");
    final PyAssignmentStatement expressionStatement = (PyAssignmentStatement)dummyFile.getFirstChild();
    final PyExpression assignedValue = expressionStatement.getAssignedValue();
    if (assignedValue != null) {
      return (PyStringLiteralExpression)((PyParenthesizedExpression)assignedValue).getContainedExpression();
    }
    return createStringLiteralFromString(str);
  }
@Override
  public PyStringLiteralExpression createStringLiteralAlreadyEscaped(String str)