src/vs/platform/log/node/spdlogLog.ts/SpdLogLogger/_createSpdLogLogger
class SpdLogLogger:	private async _createSpdLogLogger(name: string, filepath: string, rotating: boolean, donotUseFormatters: boolean): Promise<void> {
		const filecount = rotating ? 6 : 1;
		const filesize = (30 / filecount) * ByteSize.MB;
		const logger = await createSpdLogLogger(name, filepath, filesize, filecount, donotUseFormatters);
		if (logger) {
			this._logger = logger;
			this._logger.setLevel(this.getLevel());
			for (const { level, message } of this.buffer) {
				log(this._logger, level, message);
			}
			this.buffer = [];
		}
	}