src/vs/server/node/serverServices.ts/ServerLogService/warn
class ServerLogService:	warn(message: string | Error, ...args: any[]): void {
		if (this.getLevel() <= LogLevel.Warning) {
			if (this.useColors) {
				console.warn(`\x1b[93m[${now()}]\x1b[0m`, message, ...args);
			} else {
				console.warn(`[${now()}]`, message, ...args);
			}
		}
	}