src/vs/platform/log/common/log.ts/AbstractLoggerService/createLogger
class AbstractLoggerService:	createLogger(resource: URI, options?: ILoggerOptions): ILogger {
		let logger = this.loggers.get(resource.toString());
		if (!logger) {
			logger = this.doCreateLogger(resource, options?.always ? LogLevel.Trace : this.logLevel, options);
			this.loggers.set(resource.toString(), logger);
			if (!options?.always) {
				this.logLevelChangeableLoggers.push(logger);
			}
		}
		return logger;
	}