errorLog method
Implementation
void errorLog(Object txt, {bool jsonFormart = false}) {
String outputText = "$txt";
if (jsonFormart) outputText = formartJsonText(txt);
outputText = "【error】【${DateFormat('HH:mm:ss').format(DateTime.now())}】$outputText";
_streamController?.sink.add(outputText);
if (kDebugMode) debugPrint(outputText, wrapWidth: 1024);
}