'Method' is ambiguous for type lookup in this context, Error in Alamofire

I am using Alamofire for network handling in swift and run into one weird error. It seems like we can't pass Method enum as parameter.
[Error is on Method parameter]

private func apiRequest(method: Method, url: String, apiData: [String : AnyObject], completion:(finished: Bool, response: AnyObject?) ->Void) {

    Alamofire.request(method, url, parameters: apiData).responseJSON{ response in
        if let JSON = response.result.value {
            completion(finished: true, response: JSON)
        } else {
            completion(finished: false, response:nil)
        }
    }
}

Solution 1:

You have to specify the module from which to lookup object type. Call Alamofire.Method

Solution 2:

There is probably a name collision. To solve it, you can use the qualified name of the enum (including the module name):

private func apiRequest(method: Alamofire.Method, ...

Solution 3:

I have also encountered this problem, because I have declared a number of the same name of the protocol:

protocol SomeProtocol {
   static func someTypeMethod()
}

protocol SomeProtocol {
   init(someParameter: Int)
}

protocol SomeProtocol {
   var mustBeSettable: Int { get set }
   var doesNotNeedToBeSettable: Int { get }
}