src/vs/workbench/services/languageDetection/browser/languageDetectionSimpleWorker.ts/LanguageDetectionSimpleWorker/runRegexpModel
class LanguageDetectionSimpleWorker:	private async runRegexpModel(content: string, langBiases: Record<string, number>): Promise<string | undefined> {
		const regexpModel = await this.getRegexpModel();
		if (!regexpModel) { return; }

		const detected = regexpModel.detect(content, langBiases);
		return detected;
	}