         return dump(_content).description
     }
 
-
     public func port(with name: String) -> Value? {
         return _content.index { $1.displayName == name }.map { self[$0] }?.1
     }

        assert(port.state == .connected)
        self[port.id] = nil
        return port
    }

    //

        return ports[safe: choice]
    }

    internal final func add(_ port: Value) -> Value? {
        assert(self[port.id] == nil)
        self[port.id] = port
