src/vs/base/common/worker/simpleWorker.ts/SimpleWorkerClient/_request
class SimpleWorkerClient:	private _request(method: string, args: any[]): Promise<any> {
		return new Promise<any>((resolve, reject) => {
			this._onModuleLoaded.then(() => {
				this._protocol.sendMessage(method, args).then(resolve, reject);
			}, reject);
		});
	}