code: public ArrayList<Long> serviceName_http_farm_GET(String serviceName, Long vrackNetworkId, String zone) throws IOException {
  		String qPath = "/ipLoadbalancing/{serviceName}/http/farm";
  		StringBuilder sb = path(qPath, serviceName);
  		query(sb, "vrackNetworkId", vrackNetworkId);
  		query(sb, "zone", zone);
  		String resp = exec(qPath, "GET", sb.toString(), null);
  		return convertTo(resp, t2);
  	}
docs: HTTP Farm for this iplb
  
  REST: GET /ipLoadbalancing/{serviceName}/http/farm
  @param zone [required] Filter the value of zone property (=)
  @param vrackNetworkId [required] Filter the value of vrackNetworkId property (=)
  @param serviceName [required] The internal name of your IP load balancing