PromiseAndResult.swift

import FutureKit

extension Promise {
    
    func getCallbackForService() -> ( (Result<T>) -> Swift.Void )
    {
        return self.completeWithResult
    }
    
    func completeWithResult(result: Result<T>) {
        switch result {
        case .success(let value):
            self.completeWithSuccess(value)
        case .error(let error):
            self.completeWithFail(error)
        }
    }
}