src/vs/workbench/services/textMate/electron-sandbox/textMateService.ts/TextMateService/_killWorker
class TextMateService:	private _killWorker(): void {
		for (let key of Object.keys(this._tokenizers)) {
			this._tokenizers[key].dispose();
		}
		this._tokenizers = Object.create(null);

		if (this._worker) {
			this._worker.dispose();
			this._worker = null;
		}
		this._workerProxy = null;
	}