getRequestFinisher(id) {
		return (error, result) => {
			let errorCode = null;
			if (error) {
				if (result) {
					errorCode = result;
				} else {
					errorCode = '-1';
				}
			}
			this.loadTest.latency.end(id, errorCode);
			this.loadTest.pool.finishRequest(this, result, error);
		};
	}
Get a function that finishes one request and goes for the next.