src/vs/workbench/services/textMate/electron-sandbox/textMateService.ts/TextMateService/_onModelAdded
class TextMateService:	private _onModelAdded(model: ITextModel): void {
		if (!this._workerProxy) {
			return;
		}
		if (model.isTooLargeForSyncing()) {
			return;
		}
		const key = model.uri.toString();
		const tokenizer = new ModelWorkerTextMateTokenizer(this._workerProxy, model);
		this._tokenizers[key] = tokenizer;
	}