fix: IsExistLinkInNS always returns false

[y-young]

No description provided.

[s1061123]

Thank you for the PR. Could you pelase explain why you need this change?

I'm not sure your case, so appreciated you share the example case (code) to us.

[y-young]

Could you pelase explain why you need this change?

It's obvious that the previous code did not return early in the if block, so the result = false statement is always executed even if the link exists, i.e. result is always false.