src/vs/base/common/worker/simpleWorker.ts/SimpleWorkerProtocol/handleMessage
class SimpleWorkerProtocol:	public handleMessage(message: Message): void {
		if (!message || !message.vsWorker) {
			return;
		}
		if (this._workerId !== -1 && message.vsWorker !== this._workerId) {
			return;
		}
		this._handleMessage(message);
	}