@Nullable
  @Override
  public String getUnresolvedDescription() {
    PyDocStringOwner owner = PsiTreeUtil.getParentOfType(getElement(), PyDocStringOwner.class);
    if (owner instanceof PyFunction function) {
      return PyPsiBundle.message("unresolved.docstring.param.reference", function.getName(), getCanonicalText());
    }
    return null;
  }
@Nullable
  @Override
  public String getUnresolvedDescription()