How to use `dataTaskDidReceiveResponse` callback? - swift

I'm trying to use dataTaskDidReceiveResponse of the SessionDelegateof the manager but can't find how to use it. I'm new to swift (but experienced with objective-c) and can't found the correct syntax.
I have tried something like
manager.delegate.dataTaskDidReceiveResponse = {
return NSURLSessionResponseDisposition.Allow
}((session:NSURLSession, task:NSURLSessionDataTask, response:NSURLResponse)-> NSURLSessionResponseDisposition)
and some other variants. I don't know if it's just a syntax issue or my comprehension of swift/Alamofire that is lacking.
Can anyone help me found the right path?
Thanks.

Found it:
manager.delegate.dataTaskDidReceiveResponse =
{(session:NSURLSession, dataTask:NSURLSessionDataTask, response:NSURLResponse) -> NSURLSessionResponseDisposition in
return NSURLSessionResponseDisposition.Allow
}

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