@Override
  public ASTNode createDot() {
    final PsiFile dummyFile = createDummyFile(LanguageLevel.getDefault(), "a.b");
    final PyExpressionStatement expressionStatement = (PyExpressionStatement)dummyFile.getFirstChild();
    ASTNode dot = expressionStatement.getFirstChild().getNode().getFirstChildNode().getTreeNext();
    return dot.copyElement();
  }
@Override
  public ASTNode createDot()