@Override
	@SuppressWarnings("unchecked")
	public String toJSONString() {
		BetterJSONObject o = new BetterJSONObject();
		o.put("meta", this.meta);
		
		if (this.network != null) {
			o.put("network", this.network);
		}
		if (this.performance != null) {
			o.put("performance", this.performance);
		}

		return o.toJSONString();
	}