NWProtocolWebSocket.CloseCode.privateCode(_:) A close code in the private-use range (4000-4999). Declarationcase privateCode(UInt16) See AlsoClose Code Typesinit(rawValue:)NWProtocolWebSocket.CloseCode.protocolCode(_:)NWProtocolWebSocket.CloseCode.DefinedNWProtocolWebSocket.CloseCode.applicationCode(_:)