code: public static ns_conf_upgrade_history[] get(nitro_service client) throws Exception
  	{
  		ns_conf_upgrade_history resource = new ns_conf_upgrade_history();
  		resource.validate("get");
  		return (ns_conf_upgrade_history[]) resource.get_resources(client);
  	}
docs: <pre>
  Use this operation to get ns.conf file upgrade history.
  </pre>