That code won't even compile on it's own. For example this line:
Url _url = (uri);
Which makes no sense at all, and there is nothing in that code that is named "uri" so even if the spurious brackets weren't there, we'd have no idea what it was meant to do.
There is no function I am aware of called "urls" - though there are plenty of URL based methods in Unity:
unity3d urls - Google Search[
^]
And we have no idea what that chunk of "code" is supposed to do so even if we could compile it we would have no way to tell what needs doing.
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^] and think about what you need to know, and what you need to tell us in order to get help.