DrinksCodable4.swift

let jsonDecoder = JSONDecoder()
do {
    let results = try jsonDecoder.decode(Drinks.self, from:drinks.data(using: .utf8)!)
    for result in results.drinks {
        print(result.description)
        if let beer = result as? Beer {
            print(beer.alcohol_content)
        }
    }
} catch {
    print("caught: \(error)")
}