src/vs/platform/log/common/log.ts/ConsoleMainLogger/warn
class ConsoleMainLogger:	warn(message: string | Error, ...args: any[]): void {
		if (this.checkLogLevel(LogLevel.Warning)) {
			if (this.useColors) {
				console.warn(`\x1b[93m[main ${now()}]\x1b[0m`, message, ...args);
			} else {
				console.warn(`[main ${now()}]`, message, ...args);
			}
		}
	}