     case portRequired
 }
 
-public final class Client {
+public final class Client: Responder {
     public let host: String
     public let port: Int
     public let serializer: S4.RequestSerializer

        self.keepAlive = keepAlive
    }

    public convenience init(uri: URI) throws {
        try self.init(uri: uri, keepAlive: true)
    }

    public convenience init(uri: String) throws {
        try self.init(uri: URI(uri), keepAlive: true)
    }
}


        }
    }
}
