code: public static timezone_enum[] get_filtered(nitro_service service, String filter) throws Exception
  	{
  		timezone_enum obj = new timezone_enum();
  		options option = new options();
  		option.set_filter(filter);
  		timezone_enum[] response = (timezone_enum[]) obj.getfiltered(service, option);
  		return response;
  	}
docs: Use this API to fetch filtered set of timezone_enum resources.
  filter string should be in JSON format.eg: "vm_state:DOWN,name:[a-z]+"