@Nullable
  public static PyAstStringLiteralExpression getParentDefinitionDocString(@NotNull PsiElement element) {
    final PyAstDocStringOwner docStringOwner = PsiTreeUtil.getParentOfType(element, PyAstDocStringOwner.class);
    if (docStringOwner != null) {
      final PyAstStringLiteralExpression docString = docStringOwner.getDocStringExpression();
      if (PsiTreeUtil.isAncestor(docString, element, false)) {
        return docString;
      }
    }
    return null;
  }
@Nullable
  public static PyAstStringLiteralExpression getParentDefinitionDocString(@NotNull PsiElement element)