log method
Is called every time a new LogEvent is sent and handles printing or
storing the message.
Implementation
@override
List<String> log(LogEvent event) {
var prefix = ['VitGptDart', tag].join(separator);
var msg = event.message;
var dt = DateTime.now();
var timeStr = dt.toIso8601String().split('T')[1];
return [
'($prefix) [${event.level.name.toUpperCase()}] $timeStr: $msg',
];
}