code: public static ip6tunnel[] get(nitro_service service, ip6tunnel_args args) throws Exception{
  		ip6tunnel obj = new ip6tunnel();
  		options option = new options();
  		option.set_args(nitro_util.object_to_string_withoutquotes(args));
  		ip6tunnel[] response = (ip6tunnel[])obj.get_resources(service, option);
  		return response;
  	}
docs: Use this API to fetch all the ip6tunnel resources that are configured on netscaler.
  This uses ip6tunnel_args which is a way to provide additional arguments while fetching the resources.